ENERGY STAR Program Requirements
for Computer Servers
Partner Commitments
Following are the terms of the ENERGY STAR Partnership Agreement as it pertains to the manufacture
and labeling of ENERGY STAR qualified products. The ENERGY STAR Partner must adhere to the
following partner commitments:
Qualifying Products
1.	Comply with current ENERGY STAR Eligibility Criteria, which define performance requirements and
test procedures for computer servers. A list of eligible products and their corresponding Eligibility
Criteria can be found at www.enerqvstar.gov/specifications.
2.	Obtain certification of ENERGY STAR qualification from a Certification Body recognized by EPA for
computer servers prior to associating the ENERGY STAR name or mark with any product. As part of
this certification process, products must be tested in a laboratory recognized by EPA to perform
computer server testing.
Using the ENERGY STAR Name and Marks	
3.	Comply with current ENERGY STAR Identity Guidelines, which define how the ENERGY STAR name
and marks may be used. Partner is responsible for adhering to these guidelines and ensuring that its
authorized representatives, such as advertising agencies, dealers, and distributors, are also in
compliance. The ENERGY STAR Identity Guidelines are available at www.enerqvstar.gov/loqouse.
4.	Use the ENERGY STAR name and marks only in association with qualified products. Partner may not
refer to itself as an ENERGY STAR Partner unless at least one product is qualified and offered for
sale.
5.	Provide clear and consistent labeling of ENERGY STAR qualified computer servers.
5.1. Partner shall adhere to the following product-specific commitments regarding use of the
ENERGY STAR certification mark on qualified products:
5.1.1.	Partner must use the ENERGY STAR mark in all of the following ways:
1)	On the Partner's website where specification sheets, product information, and
configuration information is displayed;
a. This ENERGY STAR mark must serve as a link from the product specification
sheet to the corresponding Power and Performance Data Sheet for the
ENERGY STAR qualified configuration or Product Family.
2)	On the product's ENERGY STAR Power and Performance Data Sheet.
3)	In collateral materials, which may include printed or electronic user manuals,
product guides, and marketing brochures.
5.1.2.	If additional information about the ENERGY STAR program or other products is
provided by the Partner on its website, Partner must comply with the ENERGY STAR
Web Linking Policy, which can be found at www.enerqvstar.gov/partners;
6. Work with Value Added Resellers (VARs) of Partner's products to help ensure that computer server
products remain in compliance with ENERGY STAR requirements.
ENERGY STAR Program Requirements for Computer Servers - Partner Commitments

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6.1.	Any party within the distribution channel of an ENERGY STAR qualified computer server that
alters the power profile of a product after its date of manufacture through hardware or software
modifications must ensure that the product continues to meet the ENERGY STAR requirements
before delivering this product to the end customer. If the product no longer meets the
requirements, it may not bear the ENERGY STAR mark;
6.2.	If a VAR makes any modifications to a computer server that was previously qualified as
ENERGY STAR, re-brands the product, and promotes it as ENERGY STAR, the VAR must
become an ENERGY STAR Partner and follow the requirements outlined in this document.
Verifying Ongoing Product Qualification
7.	Participate in third-party verification testing through a Certification Body recognized by EPA for
computer servers.
8.	Comply with tests that EPA/DOE may conduct at its discretion on products that are referred to as
ENERGY STAR qualified. These products may be obtained on the open market, or voluntarily
supplied by Partner at the government's request.
Providing Information to EPA	
9.	Provide unit shipment data or other market indicators to EPA annually to assist with creation of
ENERGY STAR market penetration estimates, as follows:
9.1.	Partner must submit the total number of ENERGY STAR qualified computer servers shipped in
the calendar year or an equivalent measurement as agreed to in advance by EPA and Partner.
Partner shall exclude shipments to organizations that rebrand and resell the shipments
(unaffiliated private labelers).
9.2.	Partner must provide unit shipment data segmented by meaningful product characteristics (e.g.,
type, capacity, presence of additional functions) as prescribed by EPA.
9.3.	Partner must submit unit shipment data for each calendar year to EPA or an EPA-authorized
third party, preferably in electronic format, no later than March 1 of the following year.
Submitted unit shipment data will be used by EPA only for program evaluation purposes and will be
closely controlled. Any information used will be masked by EPA so as to protect the confidentiality of
the Partner;
10.	Report to EPA any attempts by laboratories or Certification Bodies (CBs) to influence testing or
certification results or to engage in discriminatory practices.
11.	Notify EPA of a change in the designated responsible party or contacts within 30 days using the My
ENERGY STAR Account tool (MESA) available at www.enerqvstar.gov/mesa.
Performance for Special Distinction	
In order to receive additional recognition and/or support from EPA for its efforts within the Partnership, the
ENERGY STAR Partner may consider the following voluntary measures, and should keep EPA informed
on the progress of these efforts:
	Provide quarterly, written updates to EPA as to the efforts undertaken by Partner to increase
availability of ENERGY STAR qualified products, and to promote awareness of ENERGY STAR and
its message.
	Consider energy efficiency improvements in company facilities and pursue benchmarking buildings
through the ENERGY STAR Buildings program.
	Purchase ENERGY STAR qualified products. Revise the company purchasing or procurement
specifications to include ENERGY STAR. Provide procurement officials' contact information to EPA for
periodic updates and coordination. Circulate general ENERGY STAR qualified product information to
employees for use when purchasing products for their homes.
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Feature the ENERGY STAR mark(s) on Partner website and other promotional materials. If
information concerning ENERGY STAR is provided on the Partner website as specified by the
ENERGY STAR Web Linking Policy (available in the Partner Resources section of the ENERGY
STAR website), EPA may provide links where appropriate to the Partner website.
Ensure the power management feature is enabled on all ENERGY STAR qualified displays and
computers in use in company facilities, particularly upon installation and after service is performed.
Provide general information about the ENERGY STAR program to employees whose jobs are relevant
to the development, marketing, sales, and service of current ENERGY STAR qualified products.
Provide a simple plan to EPA outlining specific measures Partner plans to undertake beyond the
program requirements listed above. By doing so, EPA may be able to coordinate, communicate,
and/or promote Partner's activities, provide an EPA representative, or include news about the event in
the ENERGY STAR newsletter, on the ENERGY STAR website, etc. The plan may be as simple as
providing a list of planned activities or milestones of which Partner would like EPA to be aware. For
example, activities may include: (1) increasing the availability of ENERGY STAR qualified products by
converting the entire product line within two years to meet ENERGY STAR guidelines; (2)
demonstrating the economic and environmental benefits of energy efficiency through special in-store
displays twice a year; (3) providing information to users (via the website and user's manual) about
energy-saving features and operating characteristics of ENERGY STAR qualified products; and (4)
building awareness of the ENERGY STAR Partnership and brand identity by collaborating with EPA
on one print advertorial and one live press event.
Join EPA's SmartWay Transport Partnership to improve the environmental performance of the
company's shipping operations. The SmartWay Transport Partnership works with freight carriers,
shippers, and other stakeholders in the goods movement industry to reduce fuel consumption,
greenhouse gases, and air pollution. For more information on SmartWay, visit
www.epa.gov/smartwav.
Join EPA's Climate Leaders Partnership to inventory and reduce greenhouse gas emissions. Through
participation, companies create a credible record of their accomplishments and receive EPA
recognition as corporate environmental leaders. For more information on Climate Leaders, visit
www.epa.gov/climateleaders.
Join EPA's Green Power Partnership. EPA's Green Power Partnership encourages organizations to
buy green power as a way to reduce the environmental impacts associated with traditional fossil fuel-
based electricity use. The partnership includes a diverse set of organizations including Fortune 500
companies, small and medium businesses, government institutions as well as a growing number of
colleges and universities. For more information on Green Power, visit www.epa.gov/greenpower.
ENERGY STAR Program Requirements for Computer Servers - Partner Commitments

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ENERGY STA
ENERGY STAR Program Requirements
Product Specification for Computer Servers
Eligibility Criteria
Draft Version 1.1
1	Following is the Version 1.1 ENERGY STAR Product Specification for Computer Servers. A product shall
2	meet all of the identified criteria if it is to earn the ENERGY STAR.
3	1 DEFINITIONS
4	A) Product Types:
5	1) Computer Server: A computer that provides services and manages networked resources for other
6	computers or networked devices. Computer servers are sold through enterprise channels for use
7	in data centers and office/corporate environments. A computer server is designed to be primarily
8	accessed via network connections, and not through direct user input devices such as a keyboard,
9	mouse, etc. In addition, a computer server has all of the following characteristics:
10	a) Marketed and sold as a computer server;
11	b) Designed for and listed as supporting computer server operating systems (OS) and/or
12	hypervisors, and targeted to run user-installed enterprise applications;
13	c) Support for error-correcting code (ECC) and/or buffered memory (including both buffered
14	DIMMs and buffered on board (BOB) configurations);
15	d) Packaged and sold with one or more ac-dc or dc-dc power supplies; and
16	e) All processors have access to shared system memory and are independently visible to a
17	single OS or hypervisor.
18	2) Blade System: A system comprised of a blade chassis and one or more removable blade servers
19	and/or other units (e.g., blade storage, blade network equipment). A blade system provides a
20	scalable means for combining multiple blade server or storage units in a single enclosure, and is
21	designed to allow service technicians to easily add or replace (hot-swap) blades in the field.
22	a) Blade Server: A computer server that is designed for use in a blade chassis. A blade server is
23	a high-density device that includes at least one processor and system memory but is
24	dependent upon shared blade chassis resources (e.g., power supplies, cooling) for operation.
25	b) Blade Chassis: An enclosure containing shared resources for the operation of blade server,
26	blade storage, and other blade form factor units. Shared resources provided by a blade
27	chassis may include power supplies, shared data storage, and hardware for dc power
28	distribution, thermal management, system management, and network services.
29	c) Blade Storage: A storage device that is designed for use in a blade chassis. A blade storage
30	device is dependent upon shared blade chassis resources (e.g., power supplies, cooling) for
31	operation.
32	3) Direct Current (Dc) Server: A computer server with one or more dc-dc power supplies that runs
33	directly off dc power.
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34

4)
Fullv Fault Tolerant Server: A computer server desianed with complete redundancy, in which
35


every computing component is replicated between two nodes running identical and concurrent
36


workloads. If one node fails or needs repair, the second node can run the workload alone to avoid
37


any downtime. A fully fault tolerant server uses two systems to simultaneously and repetitively run
38


a single workload for continuous availability in a mission critical application.
39

5)
Manaaed Server: A computer server desianed for a hiah level of availability in a hiahlv-manaaed
40


environment. A managed server has all of the following characteristics:
41


a) Capable of operation with redundant power supplies; and
42


b) An installed dedicated management controller (e.g., service processor).
43

6)
Dual-node Server: Two independent computer servers Cor nodes') contained in a sinale enclosure
44


and sharing one or more power supplies. The combined power for all nodes is distributed through
45


the shared power supplies. A dual-node server is designed and built as a single enclosure and is
46


not designed to be hot-swappable.
47

7)
Multi-node Server: Greater than two independent computer servers Cor nodes') contained in a
48


single enclosure and sharing one or more power supplies. The combined power for all nodes is
49


distributed through the shared power supplies. A multi-node server is designed and built as a
50


single enclosure and is not designed to be hot-swappable.
51

8)
Server Appliance: A self-contained computer server bundled with a pre-installed OS and
52


application software that is used to perform a dedicated function or set of tightly-coupled functions.
53


A server appliance delivers services through one or more networks (e.g., IP or SAN), and is
54


typically managed through a web or command line interface. Server appliance hardware and
55


software configurations are customized by the vendor to perform a specific task, and are not
56


intended to execute user-supplied software, including name services, firewall services,
57


authentication services, encryption services, and voice-over-IP (VoIP) services.
58
B)
Other Data Center Equipment
59

1)
Network Eauipment: A product whose primary function is to provide data connectivity amona
60


devices connected to its several ports. Data connectivity is achieved via the routing of data
61


packets encapsulated according to Internet Protocol, Fibre Channel, InfiniBand or similar protocol.
62


Examples of network equipment commonly found in data centers are routers and switches.
63

2)
Storaae Eauipment: A system composed of intearated storaae controllers, storaae devices (e.a..
64


hard drives or solid state storage) and software that provides data storage services to one or more
65


computer servers. While storage equipment may contain one or more embedded processors,
66


these processors do not execute user-supplied software applications but may execute data-
67


specific applications (e.g., data replication, backup utilities, data compression, install agents, etc.).
68
C)
Computer Server Components
69

1)
Computer Server Power Supply Unit (PSU): A self-contained component that converts a voltaae
70


input to one or more dc voltage outputs for the purpose of powering the computer server. The
71


input voltage may be from an ac source or a dc source. A computer server PSU is separable from
72


the main computer board and connects to the system via a removable or hard-wired male/female
73


electrical connection, cable, cord or other wiring (i.e. separate from, and not integrated with, the
74


system motherboard). This definition includes the following sub-types:
75


a) Ac-Dc Power Supply: A PSU that converts line voltaae ac input power into one or more
76


different dc outputs.

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77	b) Dc-Dc Power Supply: A PSU that converts a dc voltage input to one or more different dc
78	voltage outputs. This definition excludes internal dc-to-dc converters (also known as voltage
79	regulators) that are used to convert low voltage dc (e.g. 12 Volts dc) into other dc voltages for
80	use by computer server components.
81	c) Single-Output Power Supply: A PSU that delivers most of its rated power through one primary
82	dc output. Single-output PSUs may include one or more standby outputs which remain active
83	whenever connected to an input power source. There may be additional outputs besides the
84	primary output and standby outputs, however, the combined power from all additional outputs
85	is less than or equal to 20 watts. PSUs with multiple outputs at the primary voltage are
86	considered single-output PSUs, unless these outputs:
87	(1) are generated from separate converters or have separate output rectification stages,
88	and/or
89	(2) have independent current limits.
90	d) Multi-Output Power Supply: A PSU that delivers its power through more than one primary
91	output, including one or more standby outputs which remain active whenever connected to an
92	input power source. For multi-output PSUs, the combined power from additional outputs other
93	than the primary and standby outputs is greater than 20 watts. This definition also applies to
94	power supplies with multiple outputs at the same voltage that do not meet the definition of a
95	single-output PSU.
96	2) I/O Device: A device that provides data input and output capability to the computer server from
97	other devices. An I/O device may be integral to the main computer board or may be a separate
98	device connected though expansion slots such as PCI or PCIe. Examples of I/O devices include:
99	a) Ethernet devices;
100	b) InfiniBand devices;
101	c) External RAID/SAS controllers; and
102	d) Fibre Channel devices.
103	3) I/O Port: Physical circuitry within an I/O device where an independent I/O session can be
104	established. A port is not the same as a connector receptacle, since a single receptacle/connector
105	may service multiple ports of the same interface.
106	D) Operational Modes
107	1) Idle State: An operational state in which the operating system and other software have completed
108	loading and the computer server is capable of completing workload transactions, but no active
109	workload transactions are requested or pending by the system (i.e., the Computer Server is
110	operational, but not processing any useful work).
111
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112	E) Product Family: A group of product models that are (1) made by the same manufacturer, (2) subject to
113	the same ENERGY STAR qualification criteria, and (3) of a common basic design. Product models
114	within a family differ from each other according to one or more characteristics or features that either
115	(1) have no impact on product performance with regard to ENERGY STAR qualification criteria (e.g.,
116	housing and color), or (2) are specified herein as acceptable variations within a product family. For
117	Computer Servers, product families consist of product models that satisfy the following criteria:
118	1) Are from a single model line;
119	2) Include the same model motherboard;
120	3) Include processors per the following guidelines:
121	a) Incorporate processors from a single model line, with identical power specifications (e.g.,
122	TDP) and core count;
123	b) Incorporate the same quantity of installed discrete processor packages (e.g., a branded
124	processor, not a number of cores);
125	c) Processor clock speed may vary within a product family.
126	4) Include power supplies per the following guidelines:
127	a) Incorporate power supplies from a single model line, with identical technical and power
128	specifications (e.g., maximum rated output power);
129	b) The number of power supplies may vary within a product family.
130	5) Include memory (DIMMs) per the following guidelines:
131	a) Incorporate memory modules of a single type (e.g., DIMM, FB-DIMM) and interface (pin
132	configuration);
133	b) The number and capacity of memory modules may vary within a product family.
134	6) Include hard drives per the following guidelines:
135	a) Incorporate hard drives of a single type (e.g., Hard Disk Drives (HDD) or Solid State Drives
136	(SSD)), spindle speed, and interface (e.g., SCSI);
137	b) The number and capacity of hard drives may vary within a product family;
138	c) A configuration without an internal hard drive, but otherwise identical to the Minimum
139	Configuration, may be included in a product family.
140	Note: Provisions (e) and (f) reflect clarifications to the product family structure implemented as part of the
141	Computer Servers program over the past year.
142
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143

7)
Include I/O devices per the following guidelines:
144


a) Incorporate I/O devices with identical technical and power specifications.
145


b) Multiple types of I/O devices may be included in a product family.
146
147


c) A configuration without an add-in I/O device may be included in a product family, with any
number of add-in I/O devices included in other configurations.
148
F)
Product Configurations:
149
150
151

1)
Maximum Confiauration: A hiahlv confiaured product that includes the combination of power
supplies, memory, hard drives, I/O devices, etc. that results in the maximum possible power
consumption within a product family.
152
153
154
155

2)
Minimum Confiauration: A minimally confiaured product that includes at least one hard drive and
is currently available and sold in the marketplace (i.e., not under-configured). The Minimum
Configuration typically has the minimum quantity of power supplies, minimum quantity of memory
modules, a single hard drive, and a single integrated or add-in I/O device.
156
157
158

3)
Tvoical Confiauration: An intermediate confiauration between the Maximum Confiauration and
Minimum Configuration. The Typical Configuration is representative of a product with high-volume
sales.
159
160

4)
Base Confiauration: A reference confiauration that does not aualifv for anv additional power
allowances. The Base Configuration includes:
161


a) One hard disk drive or solid state drive;
162


b) 4 Gigabytes (GB) of system memory;
163
164


c) The minimum number of power supplies required to operate the Computer Server (i.e., no
redundant power supplies); and
165


d) Two ports of 1 Gigabit per second (Gbit/s) onboard Ethernet.
166
2
SCOPE
167
2.1
Included Products
168
169
2.1
1
Products that meet both of the following conditions are eligible for ENERGY STAR qualification,
with the exception of products listed in Section 2.2:
170


i. Meet the definition of a Computer Server; and
171


ii. Host 1 to 4 individual processor sockets.
172
2.2
Excluded Products
173
174
175
2.2.1
Products that are covered under other ENERGY STAR product specifications are not eligible for
qualification under this specification. The list of specifications currently in effect can be found at
www.eneravstar.aov/products.

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176	2.2.2 The following products are not eligible for qualification under this specification:
177	i. Blade Systems including Blade Servers and Blade Chassis;
178	ii. Fully Fault Tolerant Servers;
179	iii. Server Appliances;
180	iv. Multi-Node Servers;
181	v. Storage Equipment, including Blade Storage; and
182	vi. Network Equipment.
183	3 QUALIFICATION CRITERIA
184	3.1 Significant Digits and Rounding
185	3.1.1 All calculations shall be carried out with actual measured or observed values. Only the final result
186	of a calculation shall be rounded. Calculated results shall be rounded to the nearest significant
187	digit as expressed in the corresponding specification limit.
188	3.1.2 Unless otherwise specified, compliance with specification limits shall be evaluated using exact
189	values without any benefit from further rounding.
190	3.2 Power Supply (PSU) Requirements
191	3.2.1 Efficiency: Computer Server PSUs shall meet efficiency requirements as specified in Table 1.
192	Table 1: Power Supply Efficiency Requirements
Load Level as a
Percentage of
Nameplate Output
Current
Multi-Output
(Ac-Dc & Dc-Dc)
Single-Output (Ac-Dc & Dc-Dc)
All Output Levels
< 500 watts
> 500 to
1000 watts
> 1000 watts
10%
N/A
0.70
0.75
0.80
20%
0.82
0.82
0.85
0.88
50%
0.85
0.89
0.89
0.92
100%
0.82
0.85
0.85
0.88
193	3.2.2 Power Factor: Computer Server ac-dc PSUs shall meet power factor requirements as specified in
194	Table 2.
195
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196	Table 2: Power Factor Requirements for Ac-Dc Power Supplies
Load Level as a
Percentage of
Nameplate Output
Current
Multi-Output
Single-Output
< 500 watts
> 500 to
1000 watts
> 1000 watts
10%
N/A
N/A
0.65
0.80
20%
0.80
0.80
0.80
0.90
50%
0.90
0.90
0.90
0.90
100%
0.95
0.95
0.95
0.95
197	3.3 Power Management Requirements
198	3.3.1 Three-socket (3S) and four-socket (4S) servers shall be configured with processor-level power
199	management to reduce power consumption of the processor during periods of low utilization.
200	Power management for three- and four-socket servers shall be implemented as follows:
201	i. Power management functionality shall be enabled in the system BIOS, and/or a
202	management controller or service processor.
203	ii. For systems that ship with a pre-installed supervisor system (OS or hypervisor), power
204	management functionality shall be enabled by default in the supervisor system.
205	iii. All processors shall be capable of reducing power consumption in times of low utilization,
206	by either (1) reducing voltage and/or frequency through Dynamic Voltage and Frequency
207	Scaling (DVFS), or (2) using processor or core reduced power states when a core or socket
208	is not being used.
209	iv. Power management techniques that are enabled by default shall be reported on the Power
210	and Performance Data Sheet, per the requirements in Section 3.5 of this specification.
211	3.3.2 Dual-node servers with three or four sockets per node shall meet the processor power
212	management requirements specified for 3S and 4S servers.
213	3.3.3 One-socket (1S) and two-socket (2S) servers may be configured with processor level power
214	management to reduce power use of the processor during times of low utilization.
215	3.4 Idle State and Full Load Power Requirements
216	3.4.1 1S and 2S Servers: Measured Idle State power (Pole) shall be less than or equal to the Maximum
217	Idle State Power Requirement (Pdle_max)> as calculated per Equation 1.
218
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219	Equation 1: Calculation of Maximum Idle State Power
n
220	P	= P + "v P
1 IDLE Mix 1 BASE ^ 1 ADDL _i
7=1
221	Where:
222
" Ptdle M4X >s the Maximum Idle State Power Requirement,
223
" Pbase >s the base idle power allowance, as determined per
224	Table 3
225
" P.4DDL i >s the Idle State power allowance for additional
226	components, as determined per Table 4
227	Table 3: Base Idle State Power Allowances for 1S and 2S Servers
Category
Number of
Installed
Processors
(# P)
Managed Server
Base Idle State Power
Allowance, PBase
(watts)
A
1
No
55.0
B
1
Yes
65.0
C
2
No
100.0
D
2
Yes
150.0
228	Table 4: Additional Component Idle State Power Allowances for 1S and 2S Servers
Installed
Component
Applies To
Idle State Power Allowance
for Additional Components, Paddlj
(watts)
Additional Power Supply
PSUs installed explicitly
for power redundancy'
20.0 watts per Power Supply
Additional Hard Drive
(HDD and SSD)
Installed hard drives
greater than one
8.0 watts per Hard Drive
Additional Memory
(rounded to the nearest
GB)
Installed memory
greater than 4 GB
2.0 watts per GB
Additional I/O Device
(single connection speed
rounded to nearest Gbit)
Installed I/O devices
greater than two ports
of 1 Gbit, onboard
EthernetiUiiiv
< 1 Gbit: No Allowance
= 1 Gbit: 2.0 watts / Active Port
>	1 Gbit and < 10 Gbit: 4.0 watts / Active Port
>	10 Gbit: 8.0 watts / Active Port
229	i. The Additional Power Supply allowance may be applied for each PSU in addition to the
230	minimum quantity necessary to operate the Computer Server.
231	ii. The Additional I/O Device allowance may be applied for all I/O Devices over the Base
232	Configuration (i.e., Ethernet devices additional to two ports of 1 Gigabit per second (Gbit/s),
233	onboard Ethernet, plus any non-Ethernet I/O devices), including on-board I/O devices and
234	add-in I/O devices installed through expansion slots.
235	iii. The Additional I/O Device allowance shall be calculated based upon the rated link speed of
236	a single connection, rounded to the nearest Gbit. I/O devices with less than 1 Gbit speed
237	do not qualify for the Additional I/O Device allowance.
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238

iv. The Additional I/O Device allowance shall only be applied for I/O devices that are
239

active/enabled upon shipment, and are capable of functioning when connected to an active
240

switch.
241
3.4.2
Dual-node Servers: For dual-node servers with one or two sockets per node, measured Idle State
242

power on a per-node basis shall be less than or equal to the Maximum Idle State Power
243

Requirement (Pole max), as calculated per Equation 1.
244

i. If both nodes in the system are identical in configuration and use identical components, Idle
245

State power per node shall be calculated by measuring the Idle State power of the entire
246

system (including both server nodes) and dividing by two.
247

ii. Idle power for each node and the Full Idle power of the entire system (including both server
248

nodes) shall be measured and reported on the Power and Performance Data Sheet per the
249

requirements in Section 3.5 of this specification.
250
3.4.3
3S and 4S Servers: Idle State power requirements are not applicable to three-socket (3S) and
251

four-socket (4S) computer servers. However, both Idle State and Full Load power for these
252

products shall be measured per the ENERGY STAR Test Method and reported on the Power and
253

Performance Data Sheet.
254
3.5
Standard Information Reporting Requirements
255
3.5.1
Detailed information about OS, software, and power management settings used for ENERGY
256

STAR qualification shall be included in printed and electronic product literature.
257
3.5.2
A standardized Version 1.0 Power and Performance Data Sheet (PPDS) shall be completed for
258

each ENERGY STAR qualified Computer Server and posted with other product configuration
259

information on the Partner's website. Partners are encouraged to provide one data sheet per
260

qualified configuration, but may also provide one data sheet per Product Family (as defined in
261

Section 1) with data on the power and performance in Maximum, Minimum and Typical
262

configurations.
263
3.5.3
If one PPDS is used to represent a Product Family, Partners are encouraged to provide a link to a
264

more detailed power calculator where information on the power consumption of specific system
265

configurations can be found.
266
3.5.4
Templates for the PPDS can be found on the ENERGY STAR Web page for Computer Servers at
267

www.eneravstar.aov/products. Partners are encouraaed to use the template provided bv EPA, but
268

may also create their own template provided that it has been approved by EPA and contains the
269

following information, at a minimum:
270

i. Model name and number, identifying SKU and/or configuration ID;
271

ii. System characteristics (form factor, available sockets/slots, power specifications, etc.);
272

iii. System configuration(s) (including maximum, minimum and typical configurations for
273

product family qualification);
274

iv. Power data for Idle State and Full Load, estimated energy consumption in kWh/year, link to
275

power calculator (where available);
276

v. Additional power and performance data for at least one benchmark chosen by the Partner;
277

vi. Available and enabled power saving features (e.g., power management);

ENERGY STAR Program Requirements for Computer Servers - Eligibility Criteria Page 9 of 15

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278

vii. Information on the power measurement and reporting capabilities of the Computer Server;
279

viii. Select thermal information from the ASHRAE thermal report; and
280
281

ix. A list of additional qualified SKUs or configuration IDs, along with specific configuration
information (for Product Family qualification only).
282
3.6
Data Measurement and Output Requirements
283
284
285
3.6.1
Data Elements: One-socket and two-socket (1S and 2S) Manaaed Servers and all Computer
Servers with greater than two sockets (3S and 4S) shall be capable of measuring and reporting
the following data elements:
286
287

i. Input Power, in watts, with recommended accuracy at the system level of  10%, with a
cutoff of  10 watts (i.e., accuracy is not required to be better than 10 W).
288

ii. Inlet Air Temperature, in dearees Celsius, with accuracy of  3C.
289
290
291

iii. Estimated Processor Utilization, for each loaical CPU that is visible to the OS. This data
shall be reported to the operator or user of the computer server through the operating
environment (OS or hypervisor).
292
3.6.2
Reoortina Implementation:
293
294

i. Data shall be made available in a published or user-accessible format that is readable by
third-party, non-proprietary management systems;
295
296

ii. Data shall be made available to end users and third-party management systems over a
standard network connection;
297
298
299

iii. Data shall be made available via embedded components or add-in devices that are
packaged with the Computer Server (e.g., a service processor, embedded power or thermal
meter or other out-of-band technology, or pre-installed OS);
300
301
302
303

iv. Products shipped with a pre-installed OS shall include all necessary drivers and software
installed to make this information openly available. Products that do not include a pre-
installed OS shall be packaged with printed documentation of methods to access registers
that contain relevant sensor information;
304
305

v. When an open and universally available data collection and reporting standard becomes
available, manufacturers should incorporate the universal standard into their products.
306
307
3.6.3
Samolina Requirements: Data shall be averaaed on either a rollina basis or over a manufacturer
specified time period. A default rolling average or time period of 30 seconds is recommended.
308
309
3.6.4
Documentation Requirements: The followina information shall be included on the Power and
Performance Data Sheet:
310

i. Guaranteed accuracy levels for power and temperature measurements, and
311

ii. The time period used for data averaging.

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312	3.7 Additional Requirements
313	3.7.1 Energy Efficient Ethernet: EPA plans to investigate the use of the Energy Efficient Ethernet (IEEE
314	802.3az) standard for all external physical layer Ethernet (e.g., 1 Gbit and 10 Gbit wired Ethernet)
315	following its ultimate approval by IEEE. More information on the developing standard can be found
316	at http://qrouper.ieee.Org/qroups/802/3/az/.
317	4 TESTING
318	4.1 Test Methods
319	4.1.1 When testing Computer Server products, the test methods identified in Table 5 shall be used to
320	determine ENERGY STAR qualification.
321	Table 5: Test Methods for ENERGY STAR Qualification
Product Type
Test Method
All Products
ENERGY STAR Test Method for Computer Servers, Rev. Aug-
2010
(Idle Testing as outlined in Section 4.B for Idle power requirements
of Single- and Dual-socket Computer Servers, and for Idle power
and full load power reporting of all Computer Servers on the
Power and Performance Data Sheet)
All Products with an
Internal Power
Supply
EPRI Generalized Internal Power Supply Efficiency Test Protocol,
Rev. 6.4.2 (available at www.efficientpowersupplies.orq)
322	4.2 Number of Units Required for Testing
323	4.2.1 Representative Models shall be selected for testing per the following requirements:
324	i. For qualification of an individual product model, a product configuration equivalent to that
325	which is intended to be marketed and labeled as ENERGY STAR is considered the
326	Representative Model;
327	ii. For qualification of a product family, both the Maximum and Minimum Configurations that
328	are intended to be marketed and labeled as ENERGY STAR are considered
329	Representative Models. Both the Maximum and Minimum Configuration Representative
330	Models shall be configured for testing with (1) memory module(s) of the maximum available
331	density (GB/module) and (2) hard drive(s) of the maximum available capacity (GB) options.
332	4.2.2 A single unit of each Representative Model shall be selected for testing.
333	4.2.3 All tested units shall meet ENERGY STAR qualification requirements.
334	4.3 Input Power Guidelines
335	4.3.1 Products shall be tested for qualification at the input voltage/frequency combinations specified in
336	the ENERGY STAR Test Method for Computer Servers.
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337	4.3.2 Ac-powered products with multi-output PSUs shall be tested for qualification at all relevant input
338	voltage/frequency combinations for each market in which the unit is capable of operation.
339	4.3.3 Products intended to be sold into Japan may optionally be tested at Japanese input
340	voltage/frequency for Idle and Full Load testing.
341	4.4 Power Supply Testing
342	4.4.1 PSUs shall be tested using the input test conditions specified in Table 6, and as specified in the
343	ENERGY STAR Test Method for Computer Servers.
344	i. Ac-dc multi-output PSUs capable of operating with both 230V and 115V input shall be
345	tested at both input voltages.
346	ii. Ac-dc multi-output PSUs capable of operating with only one of these indicated voltages
347	shall be tested only at the applicable voltage.
348	iii. Testing with 230V input may be conducted with input frequency of either 50Hz or 60Hz.
349	Table 6: Input Conditions for Power Supply Efficiency Testing
Power Supply Type
Input Test Conditions
Ac-Dc Single-output
230 Volts, 50Hz or 60 Hz
Ac-Dc Multi-output
115 Volts, 60 Hz and/or 230 Volts, 50Hz or 60Hz
Dc-Dc
+53 Volts DC or -53 Volts DC
351	iv. 10% Load Condition: Single-output PSUs shall be tested at 10% load conditions, in addition
352	to the 20%, 50% and 100% load conditions specified in the ENERGY STAR Test Method
353	for Computer Servers.
354	v. Fan Power: Fan power may be excluded from measurements and/or efficiency calculations
355	for single-output PSUs. Fan power shall be included in measurements and efficiency
356	calculations for multi-output PSUs.
357	vi. Efficiency and Power Factor Reporting: PSU efficiency test results shall be reported to the
358	first decimal place (e.g. 85.2%). PSU power factor test results shall be reported to three
359	decimal points (e.g., 0.816).
360	5 USER INTERFACE
361	5.1.1 Manufacturers are encouraged to design products in accordance with the user interface standard
362	IEEE P1621: Standard for User Interface Elements in Power Control of Electronic Devices
363	Employed in Office/Consumer Environments. For details, see http://eetd.LBL.gov/Controls.
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364	6 EFFECTIVE DATE
365	6.1.1 Effective Date: The Version 1.1 ENERGY STAR Computer Server specification shall take effect
366	on the dates specified in Table 7. To qualify for ENERGY STAR, a product model shall meet the
367	ENERGY STAR specification in effect on its date of manufacture. The date of manufacture is
368	specific to each unit and is the date (e.g., month and year) on which a unit is considered to be
369	completely assembled.
370	6.1.2 Future Specification Revisions: EPA reserves the right to change this specification should
371	technological and/or market changes affect its usefulness to consumers, industry, or the
372	environment. In keeping with current policy, revisions to the specification are arrived at through
373	stakeholder discussions. In the event of a specification revision, please note that the ENERGY
374	STAR qualification is not automatically granted for the life of a product model.
375	Table 7: Specification Effective Dates
Effective Date
May 15, 2009
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376	APPENDIX A:
377	Sample Calculations
378	Idle State Power Requirements
379	To determine Maximum Idle State Power Requirement for ENERGY STAR qualification, determine the
380	base Idle level from Table 3, then add power allowances from Table 4. An example is provided below:
381
382	EXAMPLE: A standard single processor Computer Server with 8 GB of memory, two hard drives, and two
383	I/O devices (the first with two 1 Gbit ports and the second with six 1 Gbit ports).
384
385	1. Base allowance:
386	a. Determine base idle allowance from Table 3.
387	b. The example server is evaluated under Category A and could consume no more than
388	55.0 watts in Idle to qualify for ENERGY STAR.
389
Category
Number of
Installed
Processors
(# P)
Managed
Server
Base Idle
Power
Allowance
(W)
A
1
No
55.0
B
1
Yes
65.0
C
2
No
100.0
D
2
Yes
150.0
390
391	2. Additional Idle Power Allowances: Calculate additional idle allowances for extra components from
392	Table 4.
393
System
Characteristic
Applies To
Additional Idle Power Allowance
Additional
Power Supplies
Power supplies
installed explicitly for
power redundancy3
20.0 watts per Power Supply
Additional Hard
Drives (including
solid state drives)
Installed hard drives
greater than one
8.0 watts per Hard Drive
Additional
Memory
Installed memory
greater than 4 GBError!
Reference source not found.
2.0 watts per GB
Additional
I/O Devices
(single
connection speed
rounded to
nearest Gbit)
Installed Devices
greater than two ports
of 1 Gbit, onboard
Ethernet"
< 1 Gbit: No Allowance
= 1 Gbit: 2.0 watts / Active Port
>	1 Gbit and < 10 Gbit: 4.0 watts / Active Port
>	10 Gbit: 8.0 watts / Active Port
394
395	a. The example server has one hard drive in excess of the base configuration. It therefore is
396	provided with an additional 8.0 watt allowance for the hard drive (1 HDD x 8.0 watts).
397	b. The example server has 4 GB in excess of the base configuration. It therefore is provided
398	with an additional 8.0 watt allowance for memory (4 extra GB x 2.0 watts/GB).
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399	c. The example server has one I/O card that does not qualify for an adder: the first device
400	has only two Ethernet ports and does not exceed the two-port threshold. Its second
401	device does qualify for an adder: the server is provided with an additional 12.0 watt
402	allowance for the device (6 Gbit ports x 2.0 watts/active port).
403
404	3. Calculate the final Idle allowance by adding the base allowance with the additional power
405	allowances. The example system would be expected to consume no more than 83.0 watts at Idle
406	to qualify (55.0 W + 8.0 W + 8.0 W + 12.0 W).
407	Additional Idle Allowance - Power Supplies
408	The following examples illustrate the idle power allowances for additional power supplies:
409
410	A. If a Computer Server requires two power supplies to operate, and the configuration includes three
411	installed power supplies, the server would receive an additional 20.0 watt Idle power allowance.
412
413	B. If the same server were instead shipped with four installed power supplies, it would receive an
414	additional Idle power allowance of 40.0 watts.
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ENERGY STAR
ENERGY STAR Program Requirements
Product Specification for Computer Servers
Test Method
1	1 OVERVIEW
2	The following test method shall be used for determining compliance with requirements in the ENERGY
3	STAR Eligibility Criteria for Computer Servers, and when acquiring test data for reporting of Full Load
4	power on the ENERGY STAR Power and Performance Data Sheet.
5	2 APPLICABILITY
6	The following test method is applicable to all products eligible for qualification under the ENERGY STAR
7	Eligibility Criteria for Computer Servers.
8	3 DEFINITIONS
9	Unless otherwise specified, all terms used in this document are consistent with the definitions contained in
10 the ENERGY STAR Eligibility Criteria for Computer Servers.
11	4 TEST SETUP
12	A) Test Setup and Instrumentation: Test setup and instrumentation for all portions of this procedure shall
13	be in accordance with the requirements of IEC 62301, Ed. 1.0, "Measurement of Household Appliance
14	Standby Power", Section 4, "General Conditions for Measurements", unless otherwise noted in this
15	document. In the event of conflicting requirements, the ENERGY STAR test method shall take
16	precedence.
17	B) Input Power: Input power shall be as specified in Table 1.
18
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19	Table 1: Input Power Requirements for Computer Servers with
20	Single-Output or Dc-Dc Power Supplies
Product Type
Supply
Voltage
Voltage
Tolerance
Maximum
Total
Harmonic
Distortion
Frequency
Frequency
Tolerance
Servers with Ac-Dc
Single-Output PSUs
230 Vac
+/- 1.0 %
2.0 % (for
products
which are
rated for < 1.5
kW maximum
Power) or
5.0 % (for
products
which are
rated for > 1.5
kW maximum
Power)
50 Hz or 60
Hz
+/- 1.0 %
Servers with Ac-Dc
Multi-Output PSUsI
230 Vac
and/or
115 Vac
+/- 1.0 %
@ 230 Vac:
50 Hz or 60
Hz
@ 115 Vac:
60 Hz
+/- 1.0 %
Optional Testing
Conditions For Ac-
Dc Japanese Market
100 Vac
+/- 1.0 %
50 Hz or 60
Hz
+/- 1.0 %
Dc Servers
+/- 53 Vdc
+/- 1.0 V
N/A
N/A
21
22	C) Ambient Temperature: Ambient temperature shall be from 18 C to 27 C.
23	D) Relative Humidity:
24	1) Low-End Moisture: 5.5 C Dew Point
25	2) High-End Moisture: 60% Relative Humidity, 15 C Dew Point.
26	E) Power Meter: Power meters shall possess the following attributes:
27	1) Crest Factor: Capability to measure the current waveform without clipping.
28	a) The peak of the current waveform measured during On Mode shall determine the crest factor
29	rating requirement and the appropriate current range setting.
30	b) The full-scale value of the selected current range multiplied by the crest factor for that range
31	shall be at least 15% greater than the peak current.
32	2) Bandwidth: Minimum bandwidth as determined by an analysis of current and voltage to determine
33	the highest frequency component (harmonic) with a magnitude greater than 1% of the
34	fundamental frequency under the test conditions.
35	3) Minimum Frequency Response: 3.0 kHz
36	4) Minimum Sampling Frequency: 60 Hz
37
1 Computer Servers with Multi-Output PSUs must be tested in all applicable conditions (e.g., 115 Vac
and/or 230 Vac) at which the unit is capable of operating.
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38

5) Minimum Resolution:
39

a) 0.01 W for measurement values less than 10 W;
40

b) 0.1 Wfor measurement values from 10 Wto 100 W; and
41

c) 1.0 W for measurement values greater than 100 W.
42
F)
Measurement Accuracy:
43

1) Power measurements with a value greater than or equal to 0.5 W shall be made with an
44

uncertainty of less than or equal to 2% at the 95% confidence level.
45

2) Power measurements with a value less than 0.5 W shall be made with an uncertainty of less than
46

or equal to 0.01 W at the 95% confidence level.
47
5
TEST CONDUCT
48
A)
Measurement Location: All power measurements shall be taken at a point between the ac or dc power
49

source and the unit under test (UUT). No UPS units may be connected between the power meter and
50

the UUT. The power meter shall remain in place until all Idle and full load power data is fully recorded.
51
B)
UUTs with Multiple Power Supplies: All power supplies must be connected to the ac or dc power
52

source and operational during the test. If necessary, a Power Distribution Unit (PDU) may be used to
53

connect multiple power supplies to a single source. If a PDU is used, any overhead electrical use from
54

the PDU shall be included in the measurement of Idle power for the UUT.
55
C)
As-shipped Condition: Products shall be tested in their "as-shipped" configuration, which includes both
56

hardware configuration and system settings, unless otherwise specified in this test method. Where
57

relevant, all options and software shall be set to their default condition.
58
D)
Power Manaaement and Operatina System: The as-shipped operatina system or a representative
59

operating system must be installed. Products that are shipped without operating systems must be
60

tested with a representative OS installed. For all tests, manufacturers must ensure that only the power
61

management techniques and/or power saving features which are enabled on shipment are those
62

enabled on systems under test. Any power management features which require the presence of an
63

operating system (i.e. those that are not explicitly controlled by the BIOS or management controller)
64

must be tested using only those power management features enabled by the operating system by
65

default.
66
E)
Storaae (HDD, SSD): Products that do not include pre-installed hard drives (HDD or SSD) must have
67

an identical hardware and software configuration as a product that was tested and qualified with at
68

least one installed hard drive.
69
F)
Network Connection: The UUT must have at least one port connected to an Ethernet network switch
70

capable of the UUT's highest and lowest network speeds. The network connection must be live during
71

all tests, and although the link must be ready and able to transmit packets, no specific traffic is
72

required over the connection during testing.
73
G)
Dual-Node Servers: The UUT must have identical configurations for each node includina all hardware
74

components and software/power management settings. These systems must also be measured in a
75

way to ensure that all power from both nodes is being captured by the power meter during the entire
76

test.

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77
6
PRE-TEST UUT INITIALIZATION
78
A)
Prior to the start of testing, the UUT shall be initialized as follows:
79

1)
Record the UUT manufacturer, model name, and configuration details, including; operating
80


system name and version, processor type and speed, installed power supplies, physical memory,
81


hard drive configuration, installed I/O devices, power management features enabled, etc.
82

2)
Connect the UUT to a live Ethernet (IEEE 802.3) network switch. The live connection must be
83


maintained for the duration of testing, except for brief lapses necessary for transitioning between
84


link speeds. If a controller system is required to provide workload harness control, data
85


acquisition, or other UUT testing support, the controller system shall be connected to the same
86


network switch as the UUT and satisfy all other UUT network requirements.
87

3)
Connect the power meter to the input power source.
88

4)
Connect the UUT to the power outlet on the power meter.
89

5)
Power on the UUT and perform initial system configuration, as applicable.
90

6)
Verify that the UUT is configured in its as-shipped configuration. Maintain configuration and tuning
91


parameters throughout the testing process for both full load power and Idle power.
92

7)
Install the benchmark software intended for use to acquire power at full load. This benchmark
93


shall be run when testing for full load power in Section 7, below, and shall not significantly impact
94


the power levels during the Idle power measurement (e.g. automated benchmark software may
95


automate a system Idle state, but this simulated Idle state must be functionally equivalent to the
96


Idle state achieved in step 7.1.6), below). The UUT shall be configured to boot from the primary
97


internal boot device (hard disk drive or solid state drive).
98

8)
Configure primary storage devices integral to the UUT so they are not power managed ("spun-
99


down") during Idle testing unless they contain non-volatile cache memory integral to the drive (e.g.
100


"hybrid" hard drives). If more than one internal hard drive is installed as-shipped, the non-primary
101


hard drive(s) shall be tested with hard drive power management enabled as shipped.
102

9)
Record the installed benchmark workload and configuration, including any custom parameters or
103


settings.
104

10) Verify that only those system and hard drive power management features that are enabled upon
105


shipment to a customer are enabled for testing.
106

11) Measure and record the ac input voltage and frequency or dc input voltage.
107

12) Measure and record the test room ambient temperature.
108

13) Shut down the UUT.
109




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110	7 TEST PROCEDURES FOR ALL PRODUCTS
111	7.1 Measuring Full Load and Idle Power
112	1) Power up the UUT. Dual-Node Servers shall be booted and logged on concurrently.
113	2) Once logged in with the operating system fully loaded and ready, close any open windows so that
114	the standard operational desktop screen or equivalent ready screen is displayed.
115	3) Begin recording elapsed time immediately after completing any log in activity necessary to fully
116	boot the system.
117	4) Between 5 and 15 minutes after the initial boot or log in, set the power meter to begin
118	accumulating power values at an interval of greater than or equal to 1 reading per second and
119	commence benchmark operation at the greatest possible output (e.g., 100% load). For
120	benchmarks that measure multiple load points, only the greatest load point should be measured.
121	5) At the end of benchmark operation, calculate and record the average (arithmetic mean) power
122	observed during benchmark operation at maximum load.
123	6) Between 5 and 15 minutes after the full load benchmark test has been completed, accumulate Idle
124	power values for 5 additional minutes and record the average (arithmetic mean) value observed
125	during that 5 minute period. The UUT must maintain an Idle state throughout this period and must
126	not enter lower power states with limited availability (e.g., computer sleep or hibernate states).
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