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I have the nas connected to a UPS that reports it's power draw and it sits at about 100W at all times. There are one or two other small devices connected to it usually, so the nas itself is probably using a hair less that that at idle, but still it's quite high.
This seems very suspicious, get a cheap watt metter and test it with that. If it still says 100W I would say there's something wrong in your CPU, motherboard or software. Not necessarily the CPU, can be the motherboard or simply your Linux is set to run the CPU at full clock all the time.
Btw, I have a Ryzen 5 2600 and that thing goes down to 20W or so.
I specifically had to set things up in the BIOS so that it would never enter any efficient power/sleep states. It's a bug in the OS I'm using that was forcing me to do it, otherwise the whole thing would lock up on me.
That said, I have some smart-plugs that do power monitoring. I can try hooking up the nas to one of those just for kicks, it should be accurate enough for this sort of thing.
Edit: Just measured and looks like I was about right: 100W under load and around 80W idle
There is an issue with ryzen and certain PSUs that when it goes to idle it pulls so little power that the psu thinks it's off and kills the power, it can appear as a hang. there should be an option in the bios to change it to "typical power" or named something similar.
Oh interesting, that sound plausible. I'll check out the bios and see if I can find that setting. Thanks!
It's called power supply idle control, worth a test.