Question i9-9900k Temps with new cooler

Jun 18, 2020
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I just installed a new cooler, a Corsair H115i Elite Capellix onto my i9-9900k OC'd to 5.0GHz. My voltage is at 1.295. My idle temps have been sitting at around 34-37C, but when I go into Cinebench R23, my temps sometimes shoot up to 80-83C. I'm a little concerned about the temps. Thanks for the help.
 

Phaaze88

Champion
Ambassador
R23? How long has that been out?

R20 automatically updated to R23 on my PC... O_O


I don't see a problem, other than using Cinebench for a thermal stability test. That's not the best application for it - testing voltage stability is.
Testing thermal stability needs a constant, steady workload. Testing voltage stability needs a fluctuating one.
Cinebench falls in the latter.
Prime95, Small FFT, All 3 AVX options off, is the closest thing to Intel's own thermal stability tests.
 
Jun 18, 2020
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Thanks. I'm running Prime95 now as you told me to. Some cores are currently hitting 90C, which I don't think is good.
 
Jun 18, 2020
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Ok. It is mainly staying in the 70s and 60s now, with core 2 jumping up to 87 every 15 seconds or so. No crashes or freezes though.
 
Jun 18, 2020
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No. I’m just saying that in realbench, most of the time the cores are in the 70s, and the hottest it ever got was 82C. But there was never more than a 10 C difference between the coolest and hottest cores.
 

mdd1963

Polypheme
Your temps are semi-normal for those sorts of loads...

If that's an all-core 5 GHz, I'm surprised the temps are not higher, frankly.

(We know that all CPUs are magically useless unless at any clock speed below the magic goal of all-core 5 GHz, so we would never suggest lowering clock speeds by even 100 MHz if your temps are marginal!)
 

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