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GTX 680 wont overclock

post #1 of 8
Thread Starter 
Sup guys.

Been trieng to OC my Gainward GTX 680 Phantom 2GB a little bit, but its kind of not working:

Was using Precision X. Bumped the Power Target all the way to 150%, VOltage all the way up too, still anything higher than +30 on the Core clock makes Heaven crash in a matter of seconds. Also getting artifacts here and there. Havent even bothered with the Mem clock. Runs perfectly fine without OC.

When it crashes Heaven goes black and wil minimize, if I put it back up again it will have really low fps.

Temps dont even go above 55°C since it runs only a couple seconds when OCd (65°C at full load when not overclocked).

Am I overlooking something or is it already too high factory overclocked? (Dont think so, normally its running at 1163Mhz boost, while most cards can read 1300+?)

Thx in advance


Edit: Oh, other components:
ASrock z77 Extreme4
3570k
bequiet E8 580W
8GB Corsair DDR3 1600
post #2 of 8
I think your PSU is not good enough to handle your OC OR you've got a quite bad chip though. Most of 680 I've seen can't OC beyond 1250 Mhz.
Edited by Sharchaster - 3/30/13 at 3:28am
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My Little Beast
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post #3 of 8
Thread Starter 
Quote:
Originally Posted by Sharchaster View Post

I think your PSU is not good enough to handle your OC OR you've got a quite bad chip though. Most of 680 I've seen can't OC beyond 1250 Mhz.


How can I find out if its the PSU?
post #4 of 8
Thread Starter 
tried upping the Mem Clock now. It did go up according to the monitoring, but the framerates were lower than before by about 50%? lol
post #5 of 8
Do you have another PSU to test with? and for the memory, sometimes raising the memory too much, will reduce the performance on the card.
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post #6 of 8
Thread Starter 
nope, no other PSU :|
post #7 of 8
There isn't really a solution to this, you have a bad card, not really much you can do. Some 680s can do 1.3GHz while others can only do 1.1GHz, it's just luck of the draw. Aiming for 1.3GHz is optimistic, over 1.2GHz is a decent OC.
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post #8 of 8
Thread Starter 
so my overclock gave me an astonishing +3 points in heaven 4.0



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