WP#92 - TGG's Position on the Metric to Calculate ICT Server Capacity (Cserv) Under the EU EED Delegated Regulation (2024/1364)
The Green Grid · TGG ITE External Metrics Work Group
The Green Grid's October 2024 position paper proposes PerfCPU as the standard metric for ICT server capacity (Cserv) under the EU EED reporting regulation.
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Overview
WP#92 is a Green Grid position paper dated 16 October 2024, prepared by the TGG ITE External Metrics Work Group. The paper's context is Delegated Regulation 2024/1364 under the EU Energy Efficiency Directive (EED). That regulation sets the reporting scheme for data centres, and among the quantities to be reported is ICT server capacity (Cserv). The paper sets out the industry view on how Cserv should be calculated.
The core of the proposal is the use of PerfCPU as the metric for Cserv. PerfCPU is the maximum CPU performance defined by the equation in Section 5.2 of ETSI EN 303 470. Server capacity is thereby expressed as a value that rests on an existing standard and can be calculated per server model.
Limits: this is the position paper of an industry body, not a binding regulation, and its full text was not read, so the details of the equation and the reasoning are absent from this record. For designers and operators its value is in showing one way to fill the Cserv field in EED reporting.
Key points
- Dated 16 October 2024; paper of the TGG ITE External Metrics Work Group.
- Proposes PerfCPU as the metric for Cserv.
- PerfCPU is defined by the equation in EN 303 470 Section 5.2.
- Context: EU EED Delegated Regulation 2024/1364.
- Related standards: Delegated Regulation (EU) 2024/1364 and ETSI EN 303 470.
Using it in design
- In the EED reporting export, include a Cserv field computed from PerfCPU per server SKU.
- State the source of the PerfCPU value (EN 303 470 Section 5.2) in the report.
- Note in the reporting notes that the paper is a position, not a binding method.
- Keep the Cserv calculation configurable so it can be updated if the regulator's final method changes.
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Who should read it
Data centre operators doing EED reporting in the EU and teams building reporting tools.
Related standards
- Delegated Regulation (EU) 2024/1364
- ETSI EN 303 470
Publication details
- Authors
- TGG ITE External Metrics Work Group
- Publisher
- The Green Grid
- Year
- 2024
- Document number
- WP 92
- Document language
- English
- Source type
- Industry body
- Access
- Citation only
- Licence
- Copyright retained; citation only — the publisher’s terms apply to the original document
Original licence note
Download requires a free TGG account sign-in and is governed by The Green Grid Terms of Use; summary and facts from the public library landing page; full text not redistributed.
Citation
TGG ITE External Metrics Work Group (2024). WP#92 - TGG's Position on the Metric to Calculate ICT Server Capacity (Cserv) Under the EU EED Delegated Regulation (2024/1364). The Green Grid. WP 92. https://www.thegreengrid.org/resources/library-and-tools/wp92-tggs-position-metric-calculate-ict-server-capacity-cserv-under-eu
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Related sources
All sources on this topicThe Green Grid 2025
WP#94 - IT Work Capacity (ITWC) v1 Metric - A Methodology
In the server catalogue, add CPU SKU and PerfCPU fields.
- Dated 27 March 2025; prepared by The Green Grid ITE Metrics Work Group.
The Green Grid 2023
WP#90 - Assessment of the Use of SPEC SERT Suite Measured Data to Create a Data Center Work per Energy Metric
For EED reporting, prepare to compute work capacity from SERT-derived values (see WP#94).
- The white paper is dated 29 August 2023.
European Commission 2026
Report from the Commission to the European Parliament and the Council on the energy efficiency of data centres in the EU - COM(2026) 500 final
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European Commission 2026
Annexes 1 to 3 to Commission Delegated Regulation C(2026) 3472 - EU data centre energy (PUE) and water (WUE) efficiency classes, data centre label, and amendments to Delegated Regulation (EU) 2024/1364
Translate PUE and WUE targets into A-G classes: class A needs a design PUE of 1.15 or below and WUE of 0.1 or below; the class D boundary is 1.5 and 0.6. Write the class target into the design specification.
- WUE classes: A <= 0.1; B 0.1-0.2; C 0.2-0.4; D 0.4-0.6; E 0.6-0.8; F 0.8-1.0; G > 1.0.
European Commission 2026
Commission Delegated Regulation C(2026) 3472 of 21.9.2026 supplementing Directive (EU) 2023/1791 and amending Delegated Regulation (EU) 2024/1364 as regards the establishment of a common Union rating scheme for data centres (main act)
As labels will be issued every year from 15 August 2027, set PUE and WUE class targets (Annex I) at design stage for new and existing sites and build the metering infrastructure to the reporting requirements.
- Labels are generated automatically by the European database every year from 15 August 2027 and are publicly available electronically in all official Union languages.
European Commission, DG ENER (AIT, Borderstep Institute, EY) 2025
Assessment of next steps to promote the energy performance and sustainability of data centres in EU, including the establishment of an EU-wide rating scheme - Second technical report
Align the PUE target of new designs with the proposed MPS: design PUE below 1.3 and operational PUE below 1.4 in the first three years; for existing sites plan the path to below 1.5 by 2030.
- MPS feasibility was tested across 27 data centre archetypes with selected best available techniques (BAT).