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Optimize power consumption
(derpzilla.net)
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this post was submitted on 15 Mar 2024
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What kind of PSU are you using?
I’m using an EVGA 500 W1
That is a 500W PSU, no? That is vastly oversized and therefore inefficient for low power applications.
I don’t know much about hardware. I used these suggestions: https://forums.serverbuilds.net/t/guide-nas-killer-6-0-ddr4-is-finally-cheap/13956
I built a NAS where I can put 6 HDDs, there are enough plugs on the PSU.
Do you think the PSU is the issue?
I was testing around 5 different PSUs (500-750W silver/gold) on the same machine and I was reading 20 - 35W from the wall. So yeah I think PSU plays a big role. They are most efficient at around half of the rated load and we are using them at <10%.
Listen to this guy! Spot on. When I built my server I spent more time researching and paying for the PSU more than any other single part. Ended up with a Seasonic PRIME FANLESS PX-450. Server idles around 25W with a ryzen 5600g and 40TB of storage.
Indeed, this seems to be the issue!
I’ve checked the PX-450 but it seems to be out of stock…
I’ll do more searches about PSU, thanks!
While more expensive, a fanless one is probably a good idea as it will be optimized to avoid excess heat, which is incidently the same as inefficient power consumption for PSUs.
Have a look at this: https://www.youtube.com/watch?v=TPSuCbS-4P0
TL:DR; The 'rating' of a PSU (ie; Gold, Platinum), has very little to do with efficiency at lower power like 20-40W, and this person has compiled a list of tests for a bunch of models to show which ones are good at low power.
Here is an alternative Piped link(s):
https://www.piped.video/watch?v=TPSuCbS-4P0
Piped is a privacy-respecting open-source alternative frontend to YouTube.
I'm open-source; check me out at GitHub.
This is amazing, thank you!
And now this confirms that my current PSU is terrible…
Recommendations from such "Homelab" sites are generally not sound advise for people trying to optimize power consumption. They will happily recommend "server grade" hardware that will use hundreds of Watts easily.
While I think the PSU contributes to the problem, it is probably a set of different factors that all drive up the consumption.
Low power regular desktop PSUs are a bit hard to find on the consumer market as there is no demand for them, but you could look into PicoPSUs with an external power-brick.
Thanks I’ll check this