Skip navigation

Standard Performance Evaluation Corporation



The SERT tool (Server Efficiency Rating Tool) was created by the 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 tool 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 SERT tool is available for purchase via the SPEC order form.

Update notices:

Aug 25th, 2016: Updated client-configurations.xml for the SERT Tool versions V1.1.0+ released
• Intel Xeon E7 V4 support added

Jan 29th, 2016: The SERT Tool V1.1.1 released
Version 1.1.1 of the SERT tool is now available for license holders. This is a minor update which includes several enhancements.
• Inclusion of support for Power8 Little Endian.
• Minor GUI enhancements
• PTDaemon v1.8.0
• User Guide in Mandarin Chinese

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 patch.

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 tool 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 tool 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 the SERT tool

EPA Energy Star v2.0 for Servers

Information on the Tool

Press Releases
Press release material, documents, and announcements:  

The SERT Tool 1.1.0 Release Announcement  (March 2015)
SPEC releases the SERT tool (Server Efficiency Rating Tool)   (February 2013)
SERT Tool Beta Release Announcement  (September 2012)
Beta Testers Sought  (June 2012)

Technical and support documents, run and reporting rules, etc.

JVM Options Guide for v1.1.1
JVM Options Guide for v1.0.2 and earlier
User Guide 
Mandarin Chinese User Guide 
Run and Reporting Rules
Result File Field Descriptions 

Technical Design Documents:   
          Design Overview
          PTDaemon Tool Design

Power and Performance Methodology
Accepted Measurement Devices

Training/Demo session

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

Presentation from the EPA 
Training Presentation 

Related Publications 

Energy Efficiency of Hierarchical Server Load Distribution Strategies
Proceedings of the IEEE 23nd International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS 2015)

Analysis of the Influences on Server Power Consumption and Energy Efficiency for CPU-Intensive Workloads
ICPE'15 Proceedings of the 6th ACM/SPEC International Conference on Performance Engineering

Further Implementation Aspects Of The SERT Tool (Server Efficiency Rating Tool)
ICPE'13 Proceedings of the 4th ACM/SPEC International Conference on Performance Engineering

The Implementation Of The SERT (Server Efficiency Rating Tool)
ICPE'12 Proceedings of the 3rd ACM/SPEC International Conference on Performance Engineering

The Design And Development Of the Server Efficiency Rating Tool
ICPE'11 Proceedings of the 2nd ACM/SPEC International Conference on Performance engineering


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 tool specialists, but rather will answer your query only if SPEC's own staff SERT tool generalists are able to do so.

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


An update is available for the SERT tool (v1.1.1), released January 29th, 2016. This minor update includes several enhancements.

Update Process Page

An update is available for PTDaemon (v1.8.0), released February 5th, 2016. This update is included with version 1.1.1 of the SERT tool. Please note that DC power measurements are not supported by the tool at this time. For users of the SERT tool 1.0.0, 1.0.1, 1.0.2, or 1.1.0 the PTD v1.8.0 update can be downloaded here :

SPEC PTDaemon Update Process Page


SERT Credits