the AMD EPYC 9745 was delivering about 90% the performance of its 128 core EPYC 9755 sibling. Considering that the EPYC 9745 has just 80% the TDP rating of the EPYC 9755, that's a nice showing for the EPYC 9745 with its dense cores. When pulling back to the 320 Watt lowest cTDP, it was around 98% the performance of the 400 Watt default.

Across the mix of different workloads tested, the EPYC 9745 consumed 73% the power of the EPYC 9755 across the mix of workloads tested. The peak CPU power was at 379 Watts for the EPYC 9745 compared to 497 Watts with the EPYC 9755. With the 320 Watt cTDP power configuration was the additional power savings.

And lastly the system DC power consumption as reported by the Corsair HX1500i power supply used for this Gigabyte server.

Overall the AMD EPYC 9745 offered good performance relative to the EPYC 9755 with its full Zen 5 cores and higher TDP while offering quite a nice lead in performance-per-Watt across the many workloads tested. The EPYC 9745 is a great choice for those concerned about maximizing the power efficiency of your EPYC 9005 series server build and/or limited to a maximum 400 Watt TDP rated processors by your server platform.

Intéressant, le Zen 5c reste pas mal

au boulot on a un hyperviseur Proxmox avec un Epyc 128 cœurs Zen 4c