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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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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
How does that work out in terms of energy consumption though?
If NVMe is at least 10x faster, but consumes 5x more power, it will use less energy to read or write the same amount of data overall.
To answer that question one would need to dive deeply into idle vs. in active use power consumption. It's not like a NAS gets turned off when not in use.
My server use about the same power no matter if its idle or under full load, so I dont think drive speed makes any difference. My SSDs use much less than my HDD anyway
I'm surprised to hear NVMe us that much power - I had no idea, and just assumed they used very little.
It sounds like from a power perspective that 2.5" is better, and SSD is lowest power?
They use practically nothing when idle, but it spikes up dramatically under heavy load.
Still much less on average than a HDD that uses 5-10W even when idle and spun up.
In my limited testing 2.5 HDD uses the least power, and SATA SSDs are slightly worse than those, but I guess it also depends on the model.