- Joined
- Jan 11, 2021
- Messages
- 415
But you're not comparing CPU's here. You're comparing complete systems. [...]
Exactly. In my experience, the more and the faster spinning drives you add (and controllers eventually), the more the CPU's power consumption is negligible.
I've got an old C2750 here in my test system @home and it draws 28W at the wall: just the MoBo/BMC, CPU, 32GB ECC RAM, 3 fans w/o drives, but all onboard controllers enabled. And that's with a "dirty" bronze 300W SFX-PSU.
Idle with 10 1TB 2.5" (!) data drives, 1 boot ssd and (dual nvme) SLOG it's 37.5W. The power consumption of those WD REDs 2.5" is 0.6W idle and 1.4W mixed activity (per drive). Compare that with 3.5" hdds ...
Under "load" it's up to 55W while replicating all datasets "full tilt" (zfs stream via 1GbE/ssh+plzip) to a backup server. That's (incrementally) done about half an hour per day.
The jails/VMs (1 dnsmasq; 1 devuan + docker) don't add up anything worth mentioning.
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