i5 4690K + Hyper 412S 81 degrees?

Thatguythatexists · Sep 29, 2015

So I've had the i5 and Hyper 412S for a while now and since I haven't had time to OC myself I have had to settle with MSI OC Genie. The only problem is, at 4 GHz and 1.2V I'm getting 81 degrees celcius on my CPU during Prime with small FFTs. I plan to keep the CPU for some years and bearing in mind this is stock voltage I feel as though I might be significantly shortening its lifespan. Ambient is around 25 degrees so maybe the problem is with the cooler application? Case has good airflow with 3 120mm fans (2 of which are intake) and 1 140mm exhaust fan. Cables are pretty tidy.

DonkeyOatie · Sep 29, 2015

No. Prime 26.6 + small FFT at 80C on that combination is fine! Prime really spanks the CPU. Normal temperatures on games or other applications should be about 60C. Read this http://www.tomshardware.com/forum/id-1808604/intel-temperature-guide.html

I overclocked my 4690K, and got to 4.8Ghz, with similar temperatures to yours at similar voltages and similar speeds. You are fine.

Thatguythatexists · Sep 30, 2015

DonkeyOatie :

Thanks a lot, bumped the voltage down to 1.15 and I'm hitting mid 70s and stable at 4.0GHz, I think I'll add another fan to my cooler before going any further just for peace of mind, but thanks again for the advice.

Thatguythatexists · Oct 17, 2015

So it turns out the entire time I was actually running Prime 28.7, which I'm told uses a single instruction set that Haswell chips have problems with. Not an instruction set that it would ever use heavily in the real world. So I tried 26.6 which loads all instruction sets equally and I'm getting low-mid 60s! Still high 30s idle though, but that's probably because the Hyper 412S is super conservative on the fan speed at low load.

DonkeyOatie · Oct 17, 2015

Prime 28.7 is DANGEROUS with modern Haswells, it pushes them in ways they should not be pushed. OK for short term use, but a 24Hr burn-in could degrade your CPU.

Thatguythatexists · Oct 18, 2015

DonkeyOatie :

Oh I never did 24Hr or anything like that. I think I only lasted half an hour before I told myself it was best to turn it off for the sake of longevity. Do you know of any other programs (stress test or otherwise) that I should avoid for this reason?

DonkeyOatie · Oct 18, 2015

Prime 26.6 is great, as is OCCT. The Stress test in ASUS RealBench is very 'real', and reproduces actual use well.

I use OCCT to check my overclocks, if it passes 10 minutes of that, I continue overclocking. When I get to the limit, I use Prime 26.6 and run for overnight, and dial things back a little if it fails.

Thatguythatexists · Oct 18, 2015

DonkeyOatie :

Cool, thanks for the advice. I'll try OCCT soon.

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