Energy Efficient Power Supplies 1 Page 1 Arshad Mansoor Sponsored by: Public Interest Energy Research (PIER), California Energy.

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Presentation transcript:

Energy Efficient Power Supplies 1 Page 1 Arshad Mansoor Sponsored by: Public Interest Energy Research (PIER), California Energy Commission and administered by California Institute for Energy Efficiency (CIEE). Ecos Consulting & EPRI-PEAC on behalf of Lawrence Berkeley National Laboratory Server Power Supply Loading Guideline 21-Jun-04; Revision 0

Energy Efficient Power Supplies 2 To ensure that the loading for each DC bus for a multi output server power supply is consistent when measuring power supply efficiency. To allow consistency in comparing server power supply efficiency reported by vendors as part of the electrical specification. Need for Loading Guideline

Energy Efficient Power Supplies 3 EPS12V - LOADING GUIDELINES (Rev 2.1) Entry Chasis Power Supply (EPS) 12V Rev 2.1 Specification defines a non-redundant power supply that supports entry server computer systems.. (

Energy Efficient Power Supplies 4 EPS 1U Version 2.1 LOADING GUIDELINES Entry Power Supply (EPS) 1U Rack Power Supply Specification defines a common power supply used in entry-level servers. (

Energy Efficient Power Supplies 5 EPS 1U Version 2.1 (Continued) Entry Power Supply (EPS) 1U Rack Power Supply Specification defines a common power supply used in entry-level servers. (

Energy Efficient Power Supplies 6 EPS 2U Version 2.1 LOADING GUIDELINES Entry Power Supply (EPS) 2U Rack Power Supply Specification defines a common power supply used in entry-level servers. (

Energy Efficient Power Supplies 7 ERP12V Rev LOADING GUIDELINES Entry Redundant Power (ERP) Supply Guide defines a common redundant power sub-system for use in Pedestal servers and workstation systems. (

Energy Efficient Power Supplies 8 Loading guidelines have been developed based on proportional allocation of load current for each DC bus rail based on the MAXIMUM CURRENT rating of each DC bus rail. For 100% load level the maximum rating for each DC bus rail is decreased proportionately to ensure that the total combined loading for all the output busses is equal to the overall rating of the power supply AND the maximum combined rating for a subset of the output busses (e.g., +5V and +3.3V) is not exceeded. 8 Title Basis for Loading Guidelines Energy Efficient Power Supplies

9 Review of the proposed loading guidelines by members of Server System Infrastructure (SSI), Project Advisory Group (PAC) and other interested parties. Recommendation to adopt the proposed loading guideline as part of SSI power supply specifications. We welcome comments and suggestions. Please send your comments to Arshad Mansoor peac.com 9 Title Next Steps Energy Efficient Power Supplies