Sizing Up Servers: Intel's Skylake-SP Xeon versus AMD's EPYC 7000 - The Server CPU Battle of the Decade?by Johan De Gelas & Ian Cutress on July 11, 2017 12:15 PM EST
We tested the energy consumption of our servers for a one-minute period in several scenario. The first scenario is the point where the server under testing performs best in MySQL: the highest throughput just before the response time goes up significantly.
To test the power usage of the FPU, we measure the power consumption when POV-Ray was using all available threads.
at Lowest Resp. Time (*)
100% CPU load
|Dual Xeon E5-2699 v4||2x145 W||106||412||425|
|Dual Xeon 8176||2x165W||190||300||453|
|Dual EPYC 7601||2x180W||151||321||327|
Both the Xeon 8176 and Dual EPYC server had a few more additional components (a separate 10 GBe card for example) than the Dual Xeon E5-2699v4 system, but that does not fully explain why idle power is so much higher, especially on the Dual Xeon 8176. We lacked the time to fully investigate this, and the last two systems have relatively new firmware.
The only conclusion that we can draw so far, is that the EPYC 7601 is likely to draw more power when running integer applications, while the rather wide FP units of the Intel CPUs are real power hogs even if they do not run heavy AVX applications. To be continued...