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How do you guys overclock your 6990?

post #1 of 7
Thread Starter 
Hey guys, I have been getting this itch to OC my 6990, I only bumped it up to 6970 speeds and kinda of left it there when I first got it. ( heck I am not even sure if it has a bios switch.) I was trying to OC the card just now but even with the new MSI Afterburner it does not let me mess around with the voltage.

How far do you guys go before adding more voltage to the card?
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post #2 of 7
have you enabled the option to change the voltage in the afterburner menu? And you really dont mess with the voltage untill your card becomes unstable at the clock speed your trying to reach.
Edited by Racersnare21 - 5/11/11 at 4:29pm
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post #3 of 7
Thread Starter 
I enabled it on afterburner settings menu, and I also enabled unofficial overclocking from notepad.
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post #4 of 7
Start by keeping it at 1.175 (6970 stock V) and bump up the core in increments of 10 and test it. See how far your card can go on stock voltage.

IIRC most cards can get 920-975 on stock V with memory up to 1300-1350.
If you're starting to get errors you can start bumping the voltage. Finding the sweet spot with more core/mem with less V is best with the 6990.
Edited by 7ranslucen7 - 5/11/11 at 4:20pm
post #5 of 7
Thread Starter 
I just did a fresh install and did the same steps, voltage bar still greyed out o.o, weird.

Thanks for the tips 7ranslucen7
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post #6 of 7
HAve you ever tried to use Sapphire TriXX? I dont know if it works for other brands besides Sapphire, but you may find it does. I cant use Afterburner anymore, so I find Trixx offers me what I need.
    
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post #7 of 7
I'm at 990/1500 on OC stock voltage 1.175. I'd imagine the card would get pretty hot and loud on stock cooling tho. Best slap a waterblock on it and crank the volts!
    
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