Author Topic: Safe operating temps of a 10 core power8 cpu?  (Read 760 times)

r34per

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Safe operating temps of a 10 core power8 cpu?
« on: September 19, 2023, 03:18:10 pm »
I recently purchased a power S812LC with dual 10 core power8 cpu's for my homelab, and good lord the fans are loud on that thing even just idling. I was able to lower the fan speed to tolerable levels with ipmitool, but I wanted to make sure the cpu temps were still within safe levels. With the fans set at about 8500 rpm or so the cpu's are mid-high 60's under load and hover around 60c at idle. I wasn't able to find any definitive answer as to what the safe operating range for the power8 is; chatgpt says it's 85-90c, but it has a habit of being confidently incorrect on things. Should those temps be fine, or do I need to bump the fans up a bit?
« Last Edit: September 19, 2023, 03:20:07 pm by r34per »

ClassicHasClass

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Re: Safe operating temps of a 10 core power8 cpu?
« Reply #1 on: September 19, 2023, 04:52:57 pm »
If it's at all like the POWER9, and I can't imagine their thermal tolerances are substantially different, 60-70 C is absolutely fine. POWER9's thermal cutoff is north of 100 C. Even then it'll just downclock first.

Unfortunately the POWER8s were uniformly designed for data centres, and are not always nice to have in an office.

r34per

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Re: Safe operating temps of a 10 core power8 cpu?
« Reply #2 on: September 21, 2023, 10:15:31 am »
gotcha, thanks! Yea, I kinda got the impression that ibm never intended these to be run out of a home 5ft from where you work.

ejfluhr

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Re: Safe operating temps of a 10 core power8 cpu?
« Reply #3 on: October 04, 2023, 06:56:09 pm »
IBM rated all the POWER8 - POWER9 processors to long-term reliability temp of 85C.   >85C may be a tad hot for long life...