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Issues AGAIN:( overclocking 6990

post #1 of 6
Thread Starter 
i have a 6990 on water with koolance waterblock, temps are really low, never above 60C, but sometimes in BFBC2 i get like 5 FPS for a few secons, and in other games they just stall up. I overclocked it to 880/1500 at 1.225 voltage, and it was fine, and then 1000/1500 and fine, but must of not really been fine, so what are people getting on these cards under what? and at what voltage? any ideas why i cant get it right?
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Sig Rig
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post #2 of 6
What's up kid? I told you the 580's would be doing what you wanted, and your still playing with the ati's asking ?'s on how to make the work. LOL
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Red X9
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post #3 of 6
If the game stalls it means the Drivers are resetting because the OC is not stable. Just so you know anything over 950Mhz it all to the card. I can do 950Mhz with my HD 6970 @ 1.175v and then even with 1.275v i cant get 1000Mhz because the card will stall.
Ishimura
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Ishimura
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Silent Knight
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post #4 of 6
Thread Starter 
yea but everyone says 1ghz is capable once u got it on water, right? mean 1050 should be able to get i would think.
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Sig Rig
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Crucial M4 256GB WB 4TB External USB 3.0 HDD XSPC Raystorm CPU Water Block, 2x AX 480 Radiat... Windows 8.1 Pro 64Bit 
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post #5 of 6
Not all cards are equally stable. My first 6850 can do 1000core/1175mem at 1.2V, while my other 6850 can only do that at around 1.25V. Try upping the voltage.
Did you overclock in steps, or did you just instantly clock to the average 6990 speed? I've heard that too much voltage can make a card unstable in some cases?
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Neutrality
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post #6 of 6
Every gpu is different, just cuz others can run at 1000 doesnt mean that yours will.

If you clock it back down and it doesnt have the issues then it's the oc bein unstable, if not then perhaps it is something else you need to look at.
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Poison
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