揭示效率、性能和可持续性之间的权衡：液冷辅助空气冷却与传统空气冷却的案例研究.pdf

1、CloudflareLeslye Paniagua and Sharon AlperUnraveling the Efficiency,Performance and Sustainability Trade-Offs:Case study of LAAC vs ACUnraveling the Efficiency,Performance and Sustainability Trade-Offs:Case study of Liquid Assisted Air Cooling vs Traditional Air CoolingLeslye Paniagua and Sharon Alp

2、erDATA CENTER(DC)SUSTAINABILITYThe cooling challenge:Infrastructure readinessPowerGPU Power WCPU Power W2025up to 500 Wup to 750 WTimeLiquid CooledAir CooledChip architecture has reached a point where its very challenging to cool 100%with air.Higher power density is pushing the industry towards Liqu

3、id Cooling faster than ever.BUT As of early 2025,less than 25%of global data centers have adopted some form of liquid cooling technologyCloudflares distributed Network335+citiesin 125+countries190+citieswith GPUsHardware strategy Every service can run in every serverVery similar server design deploy

4、ed globally,many facing different:-Ambient conditions-Power availability(L11&L12)-Data Center infrastructure(readiness for Liquid Cooling)Early exploration of Liquid Cooling has started to ensure we are ready to support the upcoming technologies if/when air cooling becomes a limiting factor.100%air

5、cooledas of 2025Hardware POCCase StudyDirect comparison of Air Cooling vs Liquid Assisted Air CoolingSystem Overview2U1N chassis1x AMD Turin CPU(500W,192c)12x 64GB DDR5-56003x 8TB E1.S1x OCP3.0 2x25G NIC1x DC-SCM 2.05x 8056 DR fansLiquid Assisted Air Cooled(LAAC)Air Cooled(EVAC HEATSINK)Test planRel

6、iabilityQ:Are critical component temperatures significantly lower with LAAC vs AC?M:Monitor telemetry during testT:BMCA:Yes/No PerformanceQ:Does thermal solution impact performance?M:Direct benchmark in-lab testT:cf_benchmarkA:Yes/NoPower EfficiencyQ:Does LAAC provide significant power savings compa