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Optimize power consumption (derpzilla.net)

submitted 8 months ago* (last edited 8 months ago) by [email protected] to c/[email protected]

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So I have finally built my NAS. I used an N100 CPU because I saw it has low power consumption.

Right now I have 2 NVMe SSDs and 2 HDDs. I have installed proxmox on the 2 SSDs as RAID1. I have not partitioned the HDDs yet, they are just plugged in and powered on.

Just booting into proxmox, without any VMs or containers running, I am pulling 45W from the wall. This looks super high to me, and I’m afraid that starting to use the HDDs and running some VMs may double this…

I don’t have much references, but I have an Odroid with an external self-powered HDD, it is using 5W. I have a raspberry pi 4 with an external HDD, the raspberry is pulling 3W and the HDD 3W.

With these data, I was thinking I wouldn’t go over 20W. 45W is enormous and not something I can run 24/7, kind of a fail for a NAS…

Have I done something wrong or is it just how much it’s supposed to pull?

Edit: I have come across powertop. Using the auto tune, I was able to drop to 33-35W. I have unplugged the HDDs and dropped to 22W. I guess I cannot go lower, this may be because of the PSU or the 2 NVMe

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[–] [email protected] 2 points 8 months ago (9 children)

EVGA 500 W1

That is a 500W PSU, no? That is vastly oversized and therefore inefficient for low power applications.

[–] [email protected] 1 points 8 months ago (8 children)

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?

[–] [email protected] 2 points 8 months ago (1 children)

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.

[–] [email protected] 1 points 8 months ago

Thanks I’ll check this

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