ENERGY STAR® Servers
Server Energy Use Evaluation – Resources
February 23, 2011

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Introduction

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This document provides program updates as a foundation for EPA’s assembly of a dataset for all servers
with 1-4 processor sockets in all form factors (rack-mounted, pedestal, and blade), as listed in the scope
for the Draft 1 Version 2.0 ENERGY STAR Computer Servers Specification. For a discussion of dataneeds and background, please refer to the Server Energy Use Evaluation – Discussion Document.

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EPA encourages stakeholders to provide data in both Idle State and at full utilization as described further
in this document. Tracked changes in the text identify revisions to Draft 1 references and are based on
stakeholder comment received over the summer of 2010. For the purposes of this effort, all definitions notincluded in this document should be assumed to be identical to Draft 1.

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1 DEFINITIONS
A. Computer Server: A computer that provides services and manages networked resources for client
devices (e.g., desktop computers, notebook computers, thin clients, wireless devices, PDAs, IP
telephones, other computer servers, or other network devices). A computer server is sold throughenterprise channels for use in data centers and office/corporate environments. A computer server is
primarily accessed via network connections, versus directly-connected user input devices such as a
keyboard or mouse. For purposes of this specification, a computer server must meet all of thefollowing criteria:

191) is marketed and sold as a computer server;

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212) is designed for and listed as supporting one or more computer server operating systems (OS)and/or hypervisors, and is targeted to run user-installed enterprise applications;223) is packaged and sold with one or more ac-dc or dc-dc power supplies; and23244) is designed such that all processors have access to shared system memory and are
independently visible to a single OS or hypervisor.

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Note: EPA removed the provision for ECC memory from the Computer Server definition, since ECC isnow present in the Resilient Server sub-type definition.

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Provision 4 remains as a holdover from the Version 1.0 definition. However, EPA is interested in revisiting
the rationale for this provision with stakeholders, specifically to determine if it is still necessary in thegeneral server definition or if it would better be placed elsewhere (e.g., sub-type definition, discussion ofnodes versus sockets, etc.).

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B. Computer Server Types

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1) Managed Server: A computer server that is designed for a high level of availability in a highly
managed environment. For purposes of this specification, a managed server must meet all of thefollowing criteria:

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i)is designed to be configured with redundant power supplies; and

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ii)

contains an installed dedicated management controller (e.g., service processor).

372) Blade System: A system comprised of a blade chassis and one or more removable blade servers

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and/or other units (e.g., blade storage, blade network equipment). Blade systems provide ascalable means for combining multiple blade server or storage units in a single enclosure, and aredesigned to allow service technicians to easily add or replace (hot-swap) blades in the field.

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i)

Blade Server: A computer server that is designed for use in a blade chassis. A blade server isa high-density device that functions as an independent computer server and includes at least
one processor and system memory, but is dependent upon shared blade chassis resources(e.g., power supplies, cooling) for operation. A processor or memory module that is intended
to scale up a standalone server is not considered a Blade Server.
(a) Multi-bay Blade Server: A blade server requiring more than one bay for installation in a
blade chassis.

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ii)

Blade Chassis: An enclosure that contains shared resources for the operation of blade
servers, blade storage, and other blade form-factor devices. Shared resources provided by achassis may include power supplies, data storage, and hardware for dc power distribution,
thermal management, system management, and network services.

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iii) Blade Storage: A storage device that is designed for use in a blade chassis. A blade storage
device is dependent upon shared blade chassis resources (e.g., power supplies, cooling) for
operation.

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3) Fully Fault Tolerant Server: A computer server that is designed with complete hardware
redundancy, in which every computing component is replicated between two nodes running
identical and concurrent workloads (i.e., if one node fails or needs repair, the second node can run
the workload alone to avoid downtime). A fully fault tolerant server uses two systems tosimultaneously and repetitively run a single workload for continuous availability in a mission criticalapplication.

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4) Resilient Server: A computer server that is designed with resiliency, RAS, and self-correction
features integrated in the micro-architecture of the CPU and chipset to ensure data resiliency andaccuracy. A resilient server is often used for a limited set of workloads that may include businessprocessing, decision support, or handling of virtualized workloads. For purposes of thisspecification, a resilient server must meet all of the following criteria:

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i)contains hot-swappable components (e.g., I/O, hard drives, and ac-dc power supplies);

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ii)

contains multiple physical banks of memory and I/O busses;

68iii) provides machine check architecture (i.e., both Fault Isolation and Resiliency;

6970iv) provides memory fault detection and system recovery though DRAM chip sparing, extended
ECC, and mirrored memory;

7172v) provides support for error-correcting code (ECC) and/or buffered memory (including bothbuffered DIMMs and buffered on board (BOB) configurations);

73vi) provides end-to-end bus retry; and7475vii) supports on-line expansion/retraction of hardware resources without the need for operating
system reboot (“on-demand” features).

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5) Multi-node Server: A computer server that is designed with two or more independent server nodes
that share a single enclosure and one or more power supplies. In a multi-node server, power isdistributed to all nodes through shared power supplies. Server nodes in a multi-node server are
not designed to be hot-swappable.

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i)

Dual-node Server: A common multi-node server configuration consisting of two server nodes.

6) Server Appliance: A computer server that is bundled with a pre-installed operating system andapplication software that is used to perform a dedicated function or set of tightly coupled functions.
Server appliances deliver services through one or more networks (e.g., IP or SAN), and are
typically managed through a web or command line interface. Server appliance hardware andsoftware configurations are customized by the vendor to perform a specific task (e.g., name86
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services, firewall services, authentication services, encryption services, and voice-over-IP (VoIP)
services), and are not intended to execute user-supplied software.

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7) High Performance Computing (HPC) System: A system designed with multiple, centrally-managed
nodes connected with high-speed interconnect technology. An HPC system is intended tomaximize performance in parallel and computationally-intensive workloads. HPC system power
management features are typically removed or disabled. An HPC system includes a larger
number of memory controllers compared to a general-purpose computer server in order tomaximize data bandwidth available to the processors. For the purposes of this specification, an
HPC server must be clearly identified as an HPC server in marketing literature and productspecification sheets, and must be sold as an HPC server or system.

96978) Direct Current (Dc) Server: A computer server that is designed solely to operate on a dc powersource.

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C. Computer Server Form Factors

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1) Rack-mounted Server: A computer server that is designed for deployment in a standard 19-inch
data center rack as defined by EIA-310, IEC 60297, or DIN 41494. For the purposes of thisspecification, a blade server is considered under a separate category and excluded from the rack­
mounted category.

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2) Pedestal Server: A self-contained computer server that is designed with PSUs, cooling, I/O
devices, and other resources necessary for stand-alone operation. The frame of a pedestal serveris similar to that of a tower client computer.

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D. Computer Server Components
1) Power Supply Unit (PSU): A device that converts ac or dc input power to one or more dc power
outputs for the purpose of powering a computer server. A computer server PSU must be self­contained and physically separable from the motherboard and must connect to the system via aremovable or hard-wired electrical connection.

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Ac-Dc Power Supply: A PSU that converts line-voltage ac input power into one or more dc
power outputs for the purpose of powering a computer server.

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Dc-Dc Power Supply: A PSU that converts line-voltage dc input power to one or more dc
outputs for the purpose of powering a computer server. For purposes of this specification, adc-dc converter (also known as a voltage regulator) that is internal to a computer server and isused to convert a low voltage dc (e.g., 12 V dc) into other dc power outputs for use bycomputer server components is not considered a dc-dc power supply.

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iii) Single-output Power Supply: A PSU that is designed to deliver the majority of its rated output
power to one primary dc output for the purpose of powering a computer server. Single-output
PSUs may offer one or more standby outputs that remain active whenever connected to an
input power source. For purposes of this specification, the total rated power output from any
additional PSU outputs that are not primary and standby outputs shall be no greater than 20
watts. PSUs that offer multiple outputs at the same voltage as the primary output areconsidered single-output PSUs unless those outputs (1) are generated from separate
converters or have separate output rectification stages, or (2) have independent current limits.

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iv) Multi-output Power Supply: A PSU that is designed to deliver the majority of its rated output
power to more than one primary dc output for the purpose of powering a computer server.
Multi-output PSUs may offer one or more standby outputs that remain active wheneverconnected to an input power source. For purposes of this specification, the total rated power
output from any additional PSU outputs that are not primary and standby outputs is greaterthan or equal to 20 watts.

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2) I/O Device: A device which provides data input and output capability between a computer server
and other devices. An I/O device may be integral to the computer server motherboard or may beconnected to the motherboard via though expansion slots (e.g., PCI, PCIe). Examples of I/O
devices include discrete Ethernet devices, InfiniBand devices, RAID/SAS controllers, and Fibre

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Channel devices.

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I/O Port: Physical circuitry within an I/O device where an independent I/O session can beestablished. A port is not the same as a connector receptacle; it is possible that a single
connector receptacle can service multiple ports of the same interface.

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3) Motherboard: The main circuit board of the server. For purposes of this specification, themotherboard includes connectors for attaching additional boards and typically includes thefollowing components: processor, memory, BIOS, and expansion slots.

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4) Processor: The logic circuitry that responds to and processes the basic instructions that drive a
server. For purposes of this specification, the processor is the central processing unit (CPU) of thecomputer server. A typical CPU is a physical package to be installed on the server motherboard
via a socket or direct solder attachment. The CPU package may include one or more processor
cores.

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5) Memory: For purposes of this specification, memory is a part of a server external to the processor
in which information is stored for immediate use by the processor.

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6) Hard Drive (HDD): The primary computer storage device which reads and writes to one or morerotating magnetic disk platters.

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7) Solid State Drive (SSD): A disk drive that uses memory chips instead of rotating magnetic plattersfor data storage.

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E. Other Data Center Equipment

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1) Network Equipment: A device whose primary function is to pass data among various network
interfaces, providing data connectivity among connected devices (e.g., routers and switches).
Data connectivity is achieved via the routing of data packets encapsulated according to Internet
Protocol, Fibre Channel, InfiniBand or similar protocol.

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2) Storage Equipment: A system composed of integrated storage controllers, storage devices (e.g.,
hard drives or solid state storage) and software that provides data storage services to one or morecomputer servers. While storage equipment may contain one or more embedded processors,these processors do not execute user-supplied software applications but may execute data­
specific applications (e.g., data replication, backup utilities, data compression, install agents).

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3) Uninterruptible Power Supply (UPS): A device intended to maintain continuity of power toelectrical loads in the event of a disruption to expected utility power supply. The ride-through timeof a UPS varies from seconds to tens of minutes. UPS designs offer a range of features, fromacting as a temporary power source to the load during a power disruption, to conditioning thepower reaching the load under normal operation. UPSs contain energy storage mechanisms to
supply power to the attached load in the event of full disruption from the utility.

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F. Computer Server Power States

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1) Idle State: The operational state in which the OS and other software have completed loading, thecomputer server is capable of completing workload transactions, but no active workloadtransactions are requested or pending by the system (i.e., the computer server is operational, but
not performing any useful work). For systems where ACPI standards are applicable, Idle State
correlates only to ACPI System Level S0.

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2) Active State: The operational state in which the computer server is carrying out work in response
to prior or concurrent external requests (e.g., instruction over the network). Active state includes
both (1) active processing and (2) data seeking/retrieval from memory, cache, or internal/external
storage while awaiting further input over the network.

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G. Other Key Terms:
1) Controller System: A computer or computer server that manages a benchmark evaluation
process. The controller system performs the following functions:i)start and stop each segment (phase) of the performance benchmark;

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control the workload demands of the performance benchmark;

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iii) start and stop data collection from the power analyzer so that power and performance datafrom each phase can be correlated;

187iv) store log files containing benchmark power and performance information;

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v) convert raw data into a suitable format for benchmark reporting, submission and validation;
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vi) collect and store environmental data, if automated for the benchmark.

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2) Network Client (Testing): A computer or computer server that generates workload traffic fortransmission to a UUT connected via a network switch.

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3) RAS Features: An acronym for reliability, availability, and serviceability features. RAS issometimes expanded to RASM, which adds “Manageability” criteria. The three primary
components of RAS as related to a computer server are defined as follows:

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Reliability Features: Features that support a server’s ability to perform its intended function
without interruption due to component failures (e.g., component selection, temperature and/or
voltage de-rating, error detection and correction).

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Availability Features: Features that support a server’s ability to maximize operation at normal
capacity for a given duration of downtime (e.g., redundancy [both at micro- and macro-level]).

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iii) Serviceability Features: Features that support a server’s ability to be serviced without
interrupting operation of the server (e.g., hot plugging).

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4) Server Processor Utilization: The ratio of instantaneous processor computing activity to full-load
processor computing activity at a specified voltage and frequency.

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H. System Configuration

2063) Product Family:

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Note: The following definitions are described further in the accompanying Server Energy Use Evaluation –Discussion Document.
4) Product Family Tested Product Configurations: A set of features common to allmodels/configurations within a product family that constitute a common basic design. All
models/configurations within a product family must share the following:

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be from the same model line;

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share the same form factor (i.e., rack-mounted, blade, pedestal);

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iii) share PSUs with both the same rated maximum output and greater than or equal to the rated
efficiency of the tested configurations at all required load points specified in Section 3.2 (i.e.,
10%, 20%, 50%, and 100% for single-output; 20%, 50%, and 100% for multi-output). For the
purposes of testing, configurations shall use PSUs in non-redundant configuration.

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1) Product Family Tested Product Configurations: The required representative tests that cover an
ENERGY STAR Product Family.

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Low-end Performance Configuration: The combination of PSUs, Memory, Storage(HDD/SDD), and I/O devices that represents the lowest-price computing platform within the
Product Family.

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High-end Performance Configuration: The combination of PSUs, Memory, Storage(HDD/SDD), and I/O devices that represents either the highest-price or highest-performancecomputing platform within the Product Family.

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iii) Typical Configuration: A product configuration that lies between the Minimum and Maximum
Power configurations and is representative of a product with high volume sales.

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iv) Minimum Power Configuration: The minimum configuration that is able to boot and executesupported OSs. The Minimum Configuration contains the least number of installed PSUs,
Memory, Storage (HDD/SDD), and I/O devices, that is both offered for sale and capable ofmeeting ENERGY STAR requirements.

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v) Maximum Power Configuration: The vendor-selected combination of components thatmaximize power usage within the Product Family once assembled and operated. The
Maximum Configuration contains the greatest number of installed PSUs, Memory, Storage(HDD/SDD), and I/O devices that is both offered for sale and capable of meeting ENERGYSTAR requirements.

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2 QUALIFYING PRODUCTS

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Note: The following section contains the program scope for Version 2 of the Server specification.

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2.1

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2.2

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The following products are specifically excluded from qualification under this specification:

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INCLUDED PRODUCTS
A product must meet the definition of a Computer Server provided in Section 0 of this document to beeligible for ENERGY STAR qualification under this specification. Eligibility under Version 2.0 is limited toblade-, rack-mounted, or pedestal form factor computer servers with no more than four processor sockets.
Products explicitly excluded from Version 2.0 are identified in Section 2.2.

EXCLUDED PRODUCTS
Products that are covered under other existing ENERGY STAR product specifications are not eligible for
qualification under the ENERGY STAR Computer Server specification. The list of specifications currently
in effect can be found at www.energystar.gov/products.
••••

Fully Fault Tolerant Servers;
Server Appliances;
Storage Equipment including Blade Storage; andNetwork Equipment.

Note: Stakeholders should refer to the Draft 1 specification for definitions of Fully Fault Tolerant Servers,
Server Appliances, and Storage Equipment.

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Appendix A:
ENERGY STAR Computer Server Test Method259

1 OVERVIEW

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The following test method shall be used for determining compliance with requirements in the ENERGYSTAR Product Specification for Computer Servers, and when acquiring test data for reporting of Full Loadpower on the ENERGY STAR Power and Performance Data Sheet.

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2 APPLICABILITY

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The following test method is applicable to all products eligible for qualification under the ENERGY STAR
Product Specification for Computer Servers.

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Products must be tested with hardware and software features and capabilities in the default, or “as­shipped” configuration, unless otherwise specified in this document. This procedure is intended to befollowed in the specified sequence for UUT configuration in Appendix A Section 5 and testing in Section 6.

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3 DEFINITIONS

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Unless otherwise specified, all terms used in this document are consistent with the definitions contained in
the ENERGY STAR Product Specification for Computer Servers.

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4 TEST SETUP

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A) Input Power: Input power shall be as specified in Table 1.

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Table 1: Input Power Requirements for Computer Servers
Product TypeSupplyVoltage

Servers with Ac-Dc
Single-Output PSUs

230 Vac230 VacServers with Ac-Dc
Multi-Output PSUs1

and/or
115 Vac

Optional Testing
Conditions For AcDc Japanese Market

100 Vac

Dc Servers+/- 53 Vdc+/- 1.0 % (forproducts
which arerated for ≤ 1.5
kW maximum
Power) or

Maximum
Total
Harmonic
Distortion
2.0 % (forproducts
which arerated for ≤ 1.5
kW maximum
Power) or+/- 4.0 % (forproducts
which arerated for > 1.5
kW maximum
Power)

5.0 % (forproducts
which arerated for > 1.5
kW maximum
Power)

VoltageTolerance

Frequency
50 Hz or 60
Hz@ 230 Vac:
50 Hz or 60
Hz+/- 1.0 %

N/A

N/A

B) Ambient Temperature: Ambient temperature shall be from 18 oC to 27 oC.

277C) Relative Humidity:

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2) High-End Moisture: 60% Relative Humidity, 15 °C Dew Point.

280D) Power Meter: Power meters shall possess the following attributes:+/- 1.0 %50 Hz or 60Hz2761) Low-End Moisture: 5.5 °C Dew Point+/- 1.0 %@ 115 Vac:
60 Hz+/- 1.0 V

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Frequency
Tolerance

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1) Crest Factor: An available current crest factor of 3 or more at its rated range value. For analyzers
that do not specify the current crest factor, the analyzer must be capable of measuring anamperage spike of at least 3 times the maximum amperage measured during any 1-second
sample.

2852) Minimum Frequency Response: 3.0 kHz

2863) Minimum Resolution:

287a) 0.01 W for measurement values less than 10 W;288b) 0.1 W for measurement values from 10 W to 100 W; and289c) 1.0 W for measurement values greater than 100 W.

290E) Measurement Accuracy:

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1) Power measurements with a value greater than or equal to 0.5 W shall be made with anuncertainty of less than or equal to 2% at the 95% confidence level.

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2) Power measurements with a value less than 0.5 W shall be made with an uncertainty of less thanor equal to 0.01 W at the 95% confidence level.

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5 TEST CONDUCT

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5.1

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Note: Removed from this document as it does not apply to system testing.

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5.2

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The Partner must test and report power and efficiency test results for all computer servers. Testing shallbe conducted as follows:

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A) As-shipped Condition: Products shall be tested in their “as-shipped” configuration, which includes both
hardware configuration and system settings, unless otherwise specified in this test method. Where
relevant, all options and software shall be set to their default condition.

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B) Measurement Location: All power measurements shall be taken at a point between the ac or dc powersource and the unit under test (UUT). No UPS units may be connected between the power meter andthe UUT. The power meter shall remain in place until all Idle and full load power data is fully recorded.

307C) Power Supplies: All PSUs must be connected and operational.

PSU TEST CONFIGURATIONACTIVE MODE EFFICIENCY TEST CONFIGURATION

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1) UUTs with Multiple PSUs: All power supplies must be connected to the ac or dc power source andoperational during the test. If necessary, a Power Distribution Unit (PDU) may be used to connect
multiple power supplies to a single source. If a PDU is used, any overhead electrical use from the
PDU shall be included in the measurement of Idle power for the UUT.

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D) Power Management and Operating System: The as-shipped operating system or a representative
operating system must be installed. Products that are shipped without operating systems must be
tested with a representative OS installed. For all tests, manufacturers must ensure that only the power
management techniques and/or power saving features which are enabled on shipment are thoseenabled on systems under test. Any power management features which require the presence of an
operating system (i.e. those that are not explicitly controlled by the BIOS or management controller)
must be tested using only those power management features enabled by the operating system bydefault.

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E) Storage (HDD, SSD): Products that do not include pre-installed hard drives (HDD or SSD) must havean identical hardware and software configuration as a product that was tested and qualified with atleast one installed hard drive.

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F) Blade and Dual/Multi-Node Servers: A Blade or Dual/Multi-Node Server must have identicalconfigurations for each node or blade including all hardware components and software/power
management settings. These systems must also be measured in a way to ensure that all power fromall tested nodes/blades is being captured by the power meter the entire test.

327G) Blade Chassis: [TBD]328H) BIOS and UUT System Settings: [TBD]

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I)

I/O and Network Connection: The UUT must have at least one port connected to an Ethernet network
switch capable of the UUT’s highest and lowest network speeds. The network connection must be live
during all tests, and although the link must be ready and able to transmit packets, no specific traffic is
required over the connection during testing. The UUT shall be set up with minimal I/O add-in cards; for
testing, ensure the server offers at least one Ethernet port (using a single add-in card only if noonboard Ethernet support is offered).

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1) Ethernet Connections: Products shipped with support for Energy Efficient Ethernet (compliant withIEEE 802.3az) shall be connected only to Energy Efficient Ethernet compliant network equipment
during testing and appropriate measures shall be taken to enable EEE features on both ends ofthe network link during all tests.

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5.3

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The Partner must test and report power and efficiency test results for a computer server under thefollowing conditions:

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UUT PREPARATION

1) Record the UUT manufacturer, model name, and configuration details, including: operating
system name and version, processor type and speed, installed power supplies, physical memory,
hard drive configuration, installed I/O devices, power management features enabled, etc. Record
nameplate power ratings.
a) When testing a blade server, also record the blade chassis model.
2) Install the UUT in a test rack or location. The UUT shall not be physically moved until testing iscomplete. If the UUT is a blade system, populate the chassis as follows:

349a) All blade servers installed in the chassis must be identical.

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b) When testing a single blade, install it in the chassis location that is recommended in the
manufacturer’s documentation for optimal thermal performance. If manufacturer documented
recommendations either do not exist or are not available, install the blade in a top corner
position in the chassis.

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c) When testing a partially-populated blade system, populate 1/2 of available chassis bays,
rounding up to the nearest whole power domain if necessary. Populate bays using thefollowing guidelines:

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i.

According to the blade chassis manufacturer recommendations, with all blades in thesame power domain.

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ii.

If manufacturer documented recommendations either do not exist or are not available:
Fill the top row of the chassis first, then proceeding downward. For partially­
populated rows, fill from the center outward. For example, when installing six blades
in a chassis with 3 rows and 4 bays per row, four blades must be installed into the top
row, and two blades must be installed into the center two positions of the middle row.

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d) Fill all empty bays with blanking panels or an equivalent airflow restriction for the duration of
testing.

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Note: The section above covers testing of a half-filled blade chassis, EPA welcomes stakeholders toadditionally test and submit data for a fully-populated chassis, as long as half-chassis data is also acquired
and forwarded to EPA.

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3) Connect the UUT to a live Ethernet (IEEE 802.3) network switch. The live connection must be
maintained for the duration of testing, except for brief lapses necessary for transitioning between
link speeds. If a controller system is required to provide workload harness control, dataacquisition, or other UUT testing support, the controller system shall be connected to the same
network switch as the UUT and satisfy all other UUT network requirements.

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4) Connect the power analyzers to an ac or dc voltage source set to the appropriate voltage andfrequency for the test.

3765) Plug the UUT into the measurement power outlet on the power analyzer, as follows:

377a) no UPS units shall be connected between the power analyzer and the UUT;

378b) the power analyzer shall remain connected until all testing is complete;

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c) when testing a single blade server, the UUT shall be metered independently of the blade
chassis;

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d) when testing a Blade System, power shall be measured at the input of the blade chassis (i.e.,at the power supplies that convert data center distribution power to chassis distribution
power).

3843856) If a controller system is being used, connect the data output interface of the power analyzer(s) tothe appropriate input of the controller system..

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7) Install the workload software on the UUT. Record the installed workload and configuration,
including any custom parameters or settings.

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8) Record the input voltage and frequency.

3899) Verify that the UUT is configured in its as–shipped configuration.

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10) Verify that only those system and hard drive power management features that are enabled upon
shipment to a customer are enabled for testing.

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6 TEST PROCEDURE

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6.1

POWER AND EFFICIENCY TESTING

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1.

Power up the UUT, either by switching it on or connecting it to mains power.

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2.

If necessary, power up the controller system.

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3.

Begin recording elapsed time.

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4.

Between 5 and 15 minutes after the initial boot or log in, set the analyzer to begin accumulating
power values at an interval of greater than or equal to 1 reading per second.

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a.

5.

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Engage workload operation.
a.

6.

When testing using a controller system, the controller system may automate data
accumulation and benchmark workload operation provided the measurement interval
requirements are met.

If the workload does not automate measurement of Idle power, between 5 and 15 minutes
after the workload has completed operation, accumulate Idle power values for 5 additional
minutes. The UUT must maintain an Idle state throughout this period and must not enter
lower power states with limited availability (e.g., server sleep or hibernate states).

Record the following data at the end of workload operation:

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a.

Average Idle power (arithmetic mean) during either the automated Idle state period or 5
minute test period;

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b.

Full power (the maximum power value measured during workload operation).

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7.

When testing a Blade System, proceed as follows to derive single blade power:

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a.

Remove a single blade from the chassis;

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b.

Repeat steps 3-6.

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7 REPORTING

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7.1

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BLADE CHASSIS
1.

Report the following details:

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a.

Fan speed control features;

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b.

Available chassis cooling options;

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c.

Chassis reporting capability (e.g., input power, inlet air temperature or other thermal
information, utilization, etc.)

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7.2

LOW POWER MODES
1.

Conduct the following steps for each low power mode available on the system:

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a.

Begin recording elapsed time.

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b.

Direct the UUT to enter the low power mode to be investigated.

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c.

After the UUT has reached the low power mode, set the analyzer to begin accumulating
power values at an interval of greater than or equal to 1 reading per second.

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d.

Accumulate power values for the low power mode for 5 minutes and record the average(arithmetic mean) value observed during that 5 minute period. The UUT must maintain the
low power mode Idle state throughout this period and must not enter lower power states.

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2.

Record the following data at the end of each low power mode evaluation:

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a.

Average power in the low power mode (arithmetic mean);the following details for each low
power mode available on the system:

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b.

Rated or measured latency of the UUT in returning to a ready state from the low powermode.