I have a Proxmox server running two Opteron 6272 CPUs on an Asus KGPE-D16 (chosen because it was the fastest computer that supported Libreboot, although I haven’t gotten around to installing it). Using normal BIOS settings, it’s drawing just under 100W at idle, measured via smart plug reported in Home Assistant. With aggressive efficiency settings (PowerCap to P-state 4 and disabling CPU 2 entirely) it idles at 70W. It’s a server, not a gaming PC, so it doesn’t appear to have any options for underclocking or adjusting voltage.
Anybody know of any other ways (maybe software-based) to get the power draw down further?
4 cores worth of Kaby Lake is faster than 32 cores worth of Interlagos?
Well definitely faster than 1 Opteron at least: https://www.cpubenchmark.net/compare/1569vs2910/AMD-Opteron-6272-vs-Intel-i5-7500
Single thread is massively better, but if that’s useful or not depends on the kinds of applications you’re running.