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Standard Performance Evaluation Corporation


Server Efficiency Rating Tool (SERT)TM

September 18th, 2013: SERT V1.0.2 released
Version 1.0.2 of the SERT is now available for license holders. This is a point release which includes several enhancements, including support for 32-bit ARM processors, updated documentation and general bugfixes.

Current licensees of previous versions of the software are eligible for a free upgrade; please check the SERT Update Process Page for details on downloading and applying the SERT patch.

May 28th, 2014: SERT Memory Worklet Invalid Coefficient of Variation Messages
On May 28th, 2014 the SPECpower committee agreed that validity messages in SERT 1.0.2 for memory worklets regarding the "coefficient of variation among clients" should be treated as warnings. Therefore, results containing these messages are considered valid as long as there are no other validity issues.

Example of a coefficient of variation message that can be treated as a warning:
INVALID: The coefficient of variation among clients was 11.5%, which is greater than the threshold of 10.0% in the Flood_Full interval of worklet Flood

Please note that all other INVALID messages in a result will still cause that result to remain invalid, including coefficient of variation messages for non-memory worklets.

The Server Efficiency Rating Tool (SERT) was created by Standard Performance Evaluation Corporation (SPEC), the world's leading organization for benchmarking expertise, at the request of the US Environmental Protection Agency. It is intended to measure server energy efficiency, initially as part of the second generation of the US Environmental Protection Agency (EPA) ENERGY STAR for Computer Servers program. Designed to be simple to configure and use via a comprehensive graphical user interface, the SERT uses a set of synthetic worklets to test discrete system components such as processors, memory and storage, providing detailed power consumption data at different load levels. Results are provided in both machine- and human-readable forms, enabling automatic submission to government-sponsored certification programs as well as both summary and detail reports for use by potential customers.

The EPA’s ENERGY STAR for Computer Server Specification version 2 and SPEC

SPEC applauds the EPA for its goal to drive toward greater energy efficiency in IT Equipment, and SPEC considers the EPA ENERGY STAR Program an industry partner in this effort. The development of an Active Mode Efficiency Rating Tool is an essential component in the ongoing effort to reduce worldwide energy consumption and paves the way for a successful ENERGY STAR for Computer Server program that has the potential to harmonize energy efficiency programs worldwide.

SPEC welcomes this opportunity to work with the EPA on the SERT in support of the ENERGY STAR Specification for Computer Server v2 and is proudly looking forward to continuing our long-standing association with the EPA ENERGY STAR Development Team.

Development of the SERT is an international effort, with interest being expressed in adoption by national bodies from the European Union, China, Japan and Korea.

Government Programs that use SERT

EPA Energy Star v2.0 for Servers

Information on the SERT Tool

Server Efficiency Rating Tool (SERT) Press Releases
Press release material, documents, and announcements:  

SPEC releases Server Efficiency Rating Tool (SERT)   (February 2013)
SERT Beta Release Announcement  (September 2012)
SERT Seeks Beta Test  (June 2012)

SERT Documentation
SERT technical and support documents, run and reporting rules, etc.

JVM Options Guide
User Guide 
Run and Reporting Rules
SERT Result File Field Descriptions 

Technical Design Documents:   
          SERT Design Overview
          PTDaemon Design

Power and Performance Methodology
Accepted Measurement Devices

SERT Training/Demo session

A SERT Training/Demo session in conjunction with the SPEC Annual Meeting in Austin, TX was held on January 23, 2013 from 1:30 PM - 5:00 PM CST at the Austin Convention Center.

SERT Presentation from the EPA 
SERT Training Presentation 

Related Publications 

The Implementation Of The Server Efficiency Rating Tool
SPEC: Enabling Efficiency Measurement
The Design And Development Of The Server Efficiency Rating Tool (SERT)
Further Implementation Aspects Of The Server Efficiency Rating Tool (SERT)


Technical support requiring involvement of specialists is done by volunteers from our member institutions (see member list). Please do not send us any proprietary information in your queries. If you feel you cannot clearly ask your question without reference to proprietary information please clearly mark such communications and we will not involve our SERT specialists, but rather will answer your query only if SPEC's own staff SERT generalists are able to do so.

Frequently Asked Questions (FAQ) - Installation and runtime issues raised by users of the SERT tool.
SERT Support Request Form
Power Measurement Setup Guide


An update is available for SERT (v1.0.2), released September 18th, 2013. This update includes documentation enhancements and support for 32-bit ARM Processors.

SERT Update Process Page

An update is available for PTDaemon (v1.7.0), released August 6th, 2014. This update is not included with any version of SERT. Please note that DC power measurements are not supported by SERT at this time. For users of SERT 1.0.0, 1.0.1, or 1.0.2 the PTD v1.7.0 update can be downloaded here :

Accepted Measurement Devices and PTDaemon Update Process Page


You can purchase this or any other SPEC benchmark by using the online order form


SERT Credits