I have an ASRock Extreme4 x99 motherboard. And an Intel i7-5820k, with a Cryorig H5 Ultimate cooling it.
Using the Intel Extreme Tuning Utility to set OC the CPU and AIDA64 as a stress test.
Code:
Clock speed: 4.4Ghz
Code:
Voltage: 1.2002v
Code:
Temperature: ~74C
I ran this setup successfully for 4 hours before deeming it stable.


Then I went into the bios to make this OC permanent, using the exact same settings.
However after applying these settings the computer freezes during startup and has to be powered off by holding the power button


Short and Sweet: How come my OC is stable in Intel XTU but freezes during boot-up when OC applied in BIOS?


Intel XTU settings, AIDA 64 Stress Test

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BIOS CPU Speed OC



BIOS CPU Voltage