this post was submitted on 31 Jan 2024
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Super Power-Efficient ITX Nas CPU/Motherboard? (lemmy.world)
submitted 9 months ago by nopersonalspace@lemmy.world to c/selfhosted@lemmy.world
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I've got a NAS built in a Node 304 mini itx case that works great, but uses a ton of power. In Unraid (the OS for my NAS) there is some kind of issue with the Ryzen 3900x processor that I'm running that means I have to disable all sleep states - so it's always at it's 100W TDP. Power is super expensive where I live so I'd love to find something more power efficient.

Does it make more sense to buy a more recent(ish) 5th gen ryzen in hopes that the sleep states will work, and thus save money by keeping my existing motherboard?

Or I could go with something a bit more interesting. I've seen on Aliexpress motherboards with mobile CPU's soldered which are very power efficient. For example the N100 has an insane 6W TDP and comes on special boards with lots of sata ports and 2.5G networking (link). The worry with the n100 though is that it only officially supports 16G of ram which might not be enough for zfs.

Any thoughts? Is anyone running a power-efficient build who could throw some advice my way? Thanks!

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[–] nopersonalspace@lemmy.world 2 points 9 months ago* (last edited 9 months ago) (7 children)

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

[–] tomten@lemmy.world 6 points 9 months ago (2 children)

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.

[–] nopersonalspace@lemmy.world 1 points 9 months ago (1 children)

Oh interesting, that sound plausible. I'll check out the bios and see if I can find that setting. Thanks!

[–] tomten@lemmy.world 2 points 9 months ago

It's called power supply idle control, worth a test.

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