RedAlert

Great question. I also look at idle power draw primarily. I have just ordered 12600k for my server build. You should only consider total system power consumption, not just CPU in isolation. As these systems are on different motherboards/chipsets with different features. AMD has x570 and B550 motherboards for 5800x. B550 is more efficient than x570, but offers less PCIe bandwidth, and less features. Alder lake (12600k) only has z690 for now. I have looked through most reviews, and it seems idle consumption is more or less the same between 5800x and 12600k. Very close. But you get much more PCIe bandwidth on the new Intel platform, at least on z690. That means you will be able to connect more NVME drives and faster drives (gen 4), fast ethernet cards, SATA controllers, and other PCIe devices. Comes in handy in servers down the line. Also, the hardware transcoding only works on Intel CPUs currently. And the future 13th gen CPUs will be supported on the z690 motherboards. So IMO it is a more futureproof platform. For these reasons I chose Intel platform and 12600k for my server. I like AMD. My desktop is 5900x on x570 motherboard. But for server platform I recommend Intel