I need help overclocking my xfx 6870.

[aaka3207]

Im trying to overclock my radeon 6870.The most core clock i can get it to with msi afterburner is 920, and a memory clock of 1070, and i mean thats the clock that lets me go the longest without bf3 locking.I dont know how to change the voltage, because afterburner doesnt give me the option.Please help

asus m4a87td-evo
agi 580w psu
8gb ddr3 1600 corsair vengeance ram
phenom ii x4 960 @ 6 cores 3.4ghz

 

[FtsArTek]

In Afterburner settings, you can unlock voltage changing, although be VERY careful with that, as GPUs are extremely sensitive to voltage changes.

 

[mogen1000]

try using EVGA percision X, i got my HD 6850 to 945core no problem and i think 1100memory

I never adjusted voltage before, cuz i hate using ASUS doctor tool thing, thjinking of upgrading anyways

 

[aaka3207]

try using EVGA percision X, i got my HD 6850 to 945core no problem and i think 1100memory

I never adjusted voltage before, cuz i hate using ASUS doctor tool thing, thjinking of upgrading anyways

whats your psu?