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MSI X79a-GD64 8D & i7 3820 OC Problem


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Intel Core i7 3820 3.6ghz

MSI X79a-GD65 8d

MSI Radeon HD 7970 Lightning 3 GB

Gskill RipjawsZ 16gb (4x4gb) 1600mhz CL9

Caviar Black 640GB

Antec 920 H20 Cooler

Cougar CMX 700watts


Currently my highest OC is 4.3ghz and 4.6ghz HT off, my oc passed 3dmark11, 3dmark06, wPrime @ 212.731 sec but on 3dmark vantage cpu stress test i can't pass thru it always hangs up, i feel i'm missing something or there is something wrong with my settings. overclocking beyond 4.3ghz with HT on is almost impossible to me, my cpu doesn't boot nor post. I don't know how will i get a stable oc with my current rig. below is the setting i use to overclock please tell me if i did something wrong or am i missing something.









Everytime i attemp overclocking beyond 4.3ghz it doesn't boot at all, it just turn on then turn off over and over again, i have to clear cmos to get my cpu booting again. i can't oc over 4.5ghz...

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