this post was submitted on 06 May 2025
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Budget efficient Home Server ATX PSU (piefed.social)
submitted 1 year ago by bjoerns@piefed.social to c/selfhosted@lemmy.world
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Hi everyone,
for 20 years now i run servers in my own home to host my stuff. Because i am living in europe with quite high price tags for electricity i am always searching for ways to make my servers more power efficient.

But finding a power efficient ATX PSU with performes well in ranges around 20-25W, where my server idles most of the time, is quite challenging.

Dont get me wrong, the Server has an very efficient PSU, a Super-Flower SF450P14XE Golden Green Pro but thats now 14 years old (but serves me well). I bought it for 55€ back in the days.
Over the years i tried various budget insider tips regarding efficent PSU's (for example the Cooler Master MWE400) which all were also good but not better than the 14 year old Super Flower, which i think is kind of sad.

Just yesterday i tried a 160W PicoPSU combined with a 150W DELL DA-1 powerbrick (which should also be quite efficient), but it was the same. My Server used 1-3W more than with the Super-Flower.

Long story short: are there any efficient PSU out there that you can recommend for loads around 20-25W, that dont have a price tag like a kidney on the blackmarket?

I also have seen people trying to mod old Dell Server PSU with are 750W with platinum rating an are cheap on ebay, but thats another story.

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[–] bjoerns@piefed.social 2 points 1 year ago (1 children)

Which CPU does it use?

[–] Onomatopoeia@lemmy.cafe 2 points 1 year ago* (last edited 1 year ago) (1 children)

Device Manager shows i7-7700, 3.6ghz, 8 cores

Maxes at ~~3gb~~ 32gb of ram, unfortunately, since I run some vm's on it.

[–] bjoerns@piefed.social 1 points 1 year ago (1 children)

Quite estonishing, maybe some DELL 12V only magic.

[–] Onomatopoeia@lemmy.cafe 1 points 1 year ago* (last edited 1 year ago)

I have no explanation. Really shocked me that idle was that low, and I ran the meter on it for a week with it mostly just sitting there, and some file copy action. I could see in the power chart when I copied files, then it would fall back to 12w. Nuts.

I have to make a config change soon (add a drive and a fan), I'll put the meter back on for a week.