Running The AMD EPYC 9754 CPUs With A 320W cTDP To Enhance Power Efficiency

Written by Michael Larabel in Processors on 28 July 2023 at 10:25 AM EDT. Page 2 of 4. 7 Comments.

NAS Parallel Benchmarks benchmark with settings of Test / Class: EP.D. EPYC 9754 2P - Power 400W was the fastest.

Dropping from the default 360 Watt TDP to 320 Watts in many cases yielded minimal difference in the performance benchmarks.

For heavy multi-threaded workloads like NPB the combined 2P power consumption ended up being about 20 Watts lower in practice or about 10 Watts per CPU.

Even with just a ~20 Watt savings on the two socket server while delivering similar performance was enough to further give a little boost in the power efficiency of this dense Zen 4C configuration.

NAS Parallel Benchmarks benchmark with settings of Test / Class: LU.C. EPYC 9754 2P was the fastest.

OpenVINO benchmark with settings of Model: Face Detection FP16, Device: CPU. Xeon Platinum 8490H 2P was the fastest.

OpenVINO benchmark with settings of Model: Weld Porosity Detection FP16-INT8, Device: CPU. Xeon Platinum 8490H 2P was the fastest.

OpenVINO benchmark with settings of Model: Vehicle Detection FP16-INT8, Device: CPU. EPYC 9754 2P - Power 400W was the fastest.

OpenVINO benchmark with settings of Model: Vehicle Detection FP16-INT8, Device: CPU. EPYC 9654 2P - Power 400W was the fastest.

In practice the 360 Watt default to 320 Watt cTDP for the EPYC 9754 2P tended to yield around a combined 20 Watt difference under load.

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