Overview
ISO/IEC 21836:2020 - "Information technology - Data centres - Server energy effectiveness metric" defines a standardized measurement method to assess and report the energy effectiveness of computer servers. Prepared by ISO/IEC JTC 1/SC 39 (Sustainability, IT & Data Centres), the standard establishes the Server Energy Effectiveness Metric (SEEM). It relies on the widely adopted SPEC SERT™ (SERTv2) test suite where applicable and provides requirements for alternate “implementer‑specified” metrics when SERT is not suitable. ISO/IEC 21836:2020 is a testing and reporting standard; it does not set pass/fail thresholds for servers.
Key topics and technical requirements
- SEEM definition and scope: Measurement method to quantify server energy effectiveness across designs and configurations.
- Applicability: Criteria for using SERTv2 versus creating implementer‑specified metrics.
- Measurement and calculation procedures: Detailed steps for determining SEEM (active and idle states), including power supply considerations and metric derivation.
- Implementation steps: Guidance for deploying SEEM and SERTv2 test processes.
- Server testing requirements:
- Test configuration and environmental conditions
- Power analyser calibration and power measurement requirements
- Idle state power test method and variance specifications
- Software and hardware testing variance controls
- Product family and special configuration testing rules
- Documentation and reporting: Required implementation documentation, SEEM end‑user documentation, and server category definitions for reporting results.
- Change control: Minor update acceptance testing and component/version management.
- Normative annexes: Pre‑approved CPU architectures, operating systems, JVMs, power analysers and temperature sensors, and deployed power assessment guidance.
Practical applications and who uses this standard
ISO/IEC 21836:2020 is useful for organizations involved in server energy benchmarking, procurement, and sustainability programs:
- Server vendors and OEMs: Validate energy performance during design verification and product documentation.
