No display on screen after GPU Overclock??! Help

aikor

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Mar 31, 2014
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i have a GB radeon HD 7950...its stock clock was 1000/1250mhz

But usualy in some games it lags so i OCed to 1050mhz core clock frm 1000 and left memory clock untouched cause increasin tht caused a grey screen..so the clock was gud..no crashes in games..so i decided to increase 1 more..so oced to 1075mhz..but starting nfs rivals and after startin to drive.Game froze and blue screen came..so this time i tried to up the voltage..stock was 1.056v and i increased to 1.061...nfs rivals worked nicely for 15-20min..temp was around 70-75 degrees..but after 15min game froze again..bsod and when it auto rebooted..i never heard the beep nor the screen displayed..all fans was spinning tho..help?