You're not going to see similar power levels to those ARM devices. A massive part will be the drives, 3.5" drives take between 6 and 10W per drive while running.
this post was submitted on 15 Mar 2024
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Monitor CPU usage and frequencies to ensure CPU is throttling down properly. Then start unplugging hard drives, ram, nic cable to see how they affect power usage. Servethehome shows an N305 idling around 10w in a minipc without HDDs.
I guess I’ll do this if I don’t find a way to reduce the power consumption
Troubleshooting can be difficult. I'll only say you'll save yourself alot of time and energy by establishing a baseline for power usage with just the essential components necessary for boot to see what you're working with. Then you can make better informed decisions.
Yes definitely. This is just that it was my first time assembling a PC. I had a bit of a hard time and I am not in a hurry to disassemble it 😅
That may change in a couple of days thought
Do also have a n100 processor running proxmox with 3 VM. Can't try right now but can come back in a few days to let you know how much power it draws
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See if you can set the max power of the CPU in the BIOS.
It’s really strange for an N100 system to be drawing that much power, so maybe you have some really hungry SSDs or HDDs.
you can also do this in the OS, depending on your hardware it might be more reliable.
I have checked but I haven’t seen anything about power. By any chances, do you know in what category it may be?
I don’t know. I think that would depend on the BIOS.
it depends on the operating system you are using
For power consumption, NVMe drives use quite a lot of power, especially PCIe 4.0 ones. About 5W each during use.
3.5" HDD (especially 7200rpm or more) also consume significantly more than 2.5" 5400rpm HDDs that are optimized for low power (the latter use about 1W during use).
SATA SSDs fall somewhere in the middle.
Thanks. So If I take 5W a disk, I may have 20W just from the disks.
There are still 25W remaining. For a low power CPU that looks like a lot 😕
I never really tested it with 3.5" HDDs, but a google search makes it sound like they might be closer to 10W each.
My guess would be 25W from disks, 10W from CPU+RAM+MBO and 10W waste from PSU. Just a guess as I said
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Another way of reducing your overall power consumption: Do you need a NAS to be on 24/7?
My NAS is a NAS - just storage. It comes on and spins the 5x HDDs for a few hours in the day then shuts down. It's a NAS, I don't need to access my files at night when I'm asleep.
My VM host is a low power box with passive cooling which uses a SSD and runs my (mostly idle) VMs 24/7 for a few Watts.
So, maybe splitting up your requirements might save some power?
I planned to share it with my family. As I won’t be the only user, this is not ideal. Besides I run automatic backup and planned to also store them in the NAS. So again if it’s off half the time, this is not ideal.
Is that 45w a continuous draw, or is that from something that measured it while booting?
I have a small form factor Dell Optiplex with 1 NVME for the OS (Proxmox), and 3 drives (2.5" spinning disk), that idles at 10-20w. Running VM's pushes that up to 40-50w.
And that's still about 60-70w less than the desktop I've been running as a file server!
Unfortunately this is idling after boot. While booting it jumps to 70W and I haven’t seen it go below 45W idling…
Guess it's time to disconnect some hardware and test power consumption.
What kind of PSU are you using?
I’m using an EVGA 500 W1
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.
This is amazing, thank you!
And now this confirms that my current PSU is terrible…
Here is an alternative Piped link(s):
https://www.piped.video/watch?v=TPSuCbS-4P0
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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
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:
| Fewer Letters | More Letters |
|---|---|
| LXC | Linux Containers |
| NAS | Network-Attached Storage |
| NUC | Next Unit of Computing brand of Intel small computers |
| NVMe | Non-Volatile Memory Express interface for mass storage |
| PCIe | Peripheral Component Interconnect Express |
| PSU | Power Supply Unit |
| SATA | Serial AT Attachment interface for mass storage |
| SSD | Solid State Drive mass storage |
8 acronyms in this thread; the most compressed thread commented on today has 6 acronyms.
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