The truth about CPU power consumption

vrod

Active Member
Jan 18, 2015
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Sure I'll get some pics. currently out so it will have to wait some days. :) i'll post these in a diy thread
 

wildpig1234

Well-Known Member
Aug 22, 2016
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Too many variables. you can calculate, but the only sure thing is measuring at the wall output with a kill a watt meter (assuming those things are accurate). Its pretty difficult to get anything to idle with less than 50-60W total in a WS or server i think. plan at least 100w.
 

HellDiverUK

Active Member
Jul 16, 2014
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Its pretty difficult to get anything to idle with less than 50-60W total in a WS or server i think. plan at least 100w.
No, it's actually really pretty easy to get a server to idle less than 60W if you use anything made in the last 2 or 3 years.

Dell T20 with Xeon and 4 HDD - idle 14W, peak consumption 80W while all drives spinning up, idle with drives spinning 40W.
Fujitsu TX1310 with Xeon and 6 HDD - idle 12W, peak consumption 85W spinning up, idle with drives spinning 35W.

Heck, even the dual Opteron Dell R515 with 10 SAS drives and 128GB RAM I have in work barely uses more than 125W with all the drives running.
 

HellDiverUK

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Jul 16, 2014
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How do you like the T20 in general? They are really inexpensive here in DK, so I've ordered one just yesterday. Would appreciate any experience you might have.
The fact it only has 4x SATA ports on the board sort of sucks. Cooling of fast drives isn't great, as the whole machine is cooled by the rear 92mm fan. Slower drives like the WD Red, or Helium drives are fine, but something like a WD RE or Toshiba enterprise drive will run really hot.

Otherwise it's fine. It runs REALLY quiet, almost silent. Quieter than my Synology DS916+.

I also have a Fujitsu TX1310-M1, which is a similar machine, but it has 6 SATA ports, nicer HDD bays, and 2x120mm fans so cooling is much better. It's more expensive, of course. A little noisier than the T20 as the fans make a bit of motor noise. I use that for CCTV running Windows 10 and BlueIris, and it runs great.
 
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wildpig1234

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Aug 22, 2016
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Seems like the only true way to know idle consumption is by hooking up a kill a watt meter?

I would say that CPU power consumption is actually just a minority of the total for most people unless they're running 24/7 computing task.
 

wvaske

New Member
Apr 12, 2017
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Can we lock threads after 12 months of no replies? It can get very confusing to start reading a thread and not know it's a decade old...