100C on some test with cryorig H7 and i7-7700k (No OCing)

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fuckmewithakazoo

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Mar 30, 2017
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Hi everyone!

I'm using a gigabyte z270xp-sli motherboard (bios f1 default settings, no overclocking) a cryorig h7 cooler and an intel i7-7700k CPU. All inside a thermaltake F51 suppressor case.

After many failed attempts to install the cooler I managed to get it right and my temperatures dropped to where they stay under 45C on idle and under 75 under load (stress testing). So I'm thinking the problem isn't a bad mounting of the cooler.
However if I use the stress FPU option in aida64 or if I use prime95 (I'm using the latest version of both programs) the temperatures instantly skyrocket to 100C and the CPU starts throttling. When this happens I immidately stop the tests to avoid damaging the CPU.
Could anyone please help me? should I return the CPU given that it does have acceptable temps under non synthetic loads?

Here's an album of the default bios settings I'm using right now and a screenshot of hwinfo when I enable the FPU option.
http://tinypic.com/a/b7j1xe/1

Please help a newbie out
 
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Supernova1138

Supernova1138

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Mar 22, 2011
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The latest version of Prime95 isn't good for thermal testing on recent Intel CPUs, versions later than 26.6 add AVX instructions that cause temperatures to skyrocket to insanely high levels on any Intel chip made after Ivy Bridge.

If you're getting okay temperatures under real world usage, you're fine. A lot of the 7700ks are running hot, apparently Intel cheaped out more on the thermal paste between the IHS and the die and combined with pushing higher clockspeeds leads to a hotter running chip than Skylake.
 
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fuckmewithakazoo

Prominent
Mar 30, 2017
2
0
510


Thank you for replying. Yes I've read that about prime95 and I'm downloading an older version right now to redo the tests. However when I use AIDA64 with stress FPU option selected I still get dangerously high temps as well, this doesn't happen with cinebench, nor cpu-z stress tool nor AIDA64 with stress FPU option unchecked.
In all these scenarios I get temperatures under 75C at 100 load (tested for 20 minutes).
I knew Kaby ran hotter than Skylake when I decided to purchase it, but anything above 85 is unnacceptable and 100 is dangerous. The thing that bothers me is that it doesn't reach that temperature in every test, only in AIDA64.
Like I've said I'm not doing any OCing and my case is supposed to be properly aired. I will try an older version of prime95.
 
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