i7-4790k Overclocking help

KuronekoLP

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Mar 5, 2015
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Specs:
CPU: i7-4790k
MOBO: Asus Z97-A
RAM: 32GB 1866 Mhz
GPU: GTX 1070 Strix
Cooler: NZXT X61

I decided to OC my CPU and i watched a few videos on how to.
These ones to be precise:

1. https://www.youtube.com/watch?v=0CHs5_TdpXE&t=1235s
2. https://www.youtube.com/watch?v=w-oAf2tVDcg&t=327s

I OC'ed my CPU through the bios and it went well, managed to get 4.7 GHz on 1,22V stable.
I used AIDA64 to stress test and ran it overnight for 9 hours.

http://puu.sh/sIsFl/d5f9b54ea4.png
http://puu.sh/sIsFO/5247deb437.png

The MAIN issue is that i tried running a stress test on Prime95 and after a min or two, i got bluescreened and the pc restarted.
I did my entire stress test on AIDA64, started from 4,4 to 4,7 and had crashes here and there until i found a stable 4.7GHz with 1,22V below 90C.

Should i be worried since i keep getting crashes on Prime95?
 
Solution
Which version of P95 are you using? 28.9 will stress the daylights out of your CPU and only the most stable will make it through. The average gamer will never put a CPU through it's paces like 28.9

KuronekoLP

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Mar 5, 2015
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v28.10 build1
 

xFeaRDom

Estimable
Adding to the above, use Prime 95 Version 26.6 or below for more accurate stress tests and temperature readings, the new versions provide unrealistic temperature readings, read here for more:

http://www.tomshardware.co.uk/answers/id-3036790/reading-intel-temperature-guide-3570k-working-flawlessly.html

http://www.tomshardware.co.uk/forum/id-1800828/intel-temperature-guide.html

Second link leads to the guide, here is the quote:

"Prime95 Version 26.6 Small FFT's is the standard for CPU thermal testing, because it's a steady-state 100% workload which runs Core 2 processors and Core i variants with Hyperthreading within 3% TDP at stock settings. This is the test that Real Temp uses to test sensors.

Core i 2nd through 6th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. Recent versions of Prime95 such as 28.9 run AVX code on the Floating Point Unit (FPU) math coprocessor, which produces unrealistically high temperatures. The FPU test in the utility AIDA64 shows similar results.

Prime95 v26.6 produces temperatures on 3rd through 6th Generation processors more consistent with 2nd Generation, which also have AVX instructions, but do not suffer from thermal extremes due to having fewer transistors in a larger Die with greater surface area, and a soldered Integrated Heat Spreader."
 

KuronekoLP

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Mar 5, 2015
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Good to know, just downloaded 26,6 and will do some more tests.

 

KuronekoLP

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Mar 5, 2015
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Thanks for the detailed description and the links