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CPU Overclocking Problem

Hello,

I tried overclocking my system, but after I save and exit BIOS the computer reboots to a black screen with my GPU fans going at max speed. I tried decreasing the multiplier, increasing/decreasing Vcore, increasing/decreasing input volts, using the auto clock set to 4ghz, tried with speedstep and turboboost enabled and disabled all to no avail. I'm at a loss as to what would cause the GPU to do that when I'm messing with CPU settings. I can reset the CMOS settings and it will boot back up no problem. As it sits nothing is overclocked. Temps at idle and load respectively while stock: CPU 30/50 GPU 45/70. It's never done this or crashed stock only when trying to OC the CPU.

I was attempting to start at 40 multiplier with 1.05-1.2 volts, 1.75-1.9 input volts but all with the same results

Build:
Intel I5 4690K 3.5ghz (3.9ghz boost)
ASrock z97 Extreme4
CM 212
4x4gb ddr3 1600
Sapphire nitro r9 390
Rosewill ARC 650

Appreciate any advice. Thanks!
4 answers Last reply Best Answer
More about cpu overclocking problem
  1. Check if PCIE clock stays 100MHz NOT AUTO!
  2. Robert Ban said:
    Check if PCIE clock stays 100MHz NOT AUTO!


    For ASrock's BIOS I had these settings which I think achieve what you're telling me. BCLK Freq: changed from auto and set to 100mhz then BCLK/PCIE ratio which I set to 1 instead of auto. Even with just changing these settings and applying no overclock my PC still boots to black screen and GPU fans kick to 100%. Please let me know what else I can try. Thanks!
  3. Try using 2 ram sticks in slot 2 and 4 for overclocking.
    Did you try to bump up voltage for ram up to 1.65V (if it has heatsink).
  4. Best answer
    Robert Ban said:
    Try using 2 ram sticks in slot 2 and 4 for overclocking.
    Did you try to bump up voltage for ram up to 1.65V (if it has heatsink).


    Thanks for the tips. I think I figured it out. There is a small UEFI/Legacy button on the graphics card that when I pressed it started up with the overclock. However when fine tuning the overclock the PC crashed during a stress test and it kicked back into the high fan mode with black screen..clicking the button on and off again fixed it though.. Thanks again for your help!
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