After having 2 bad EVGA GTX 580's SC RMA'ed and receiving 2 new ones about a week ago, I started to test how far I could go with stock voltage. This was done in SLI with both cards synced.
Currently I ran heaven on extreme and 3DMark11 performance tests with 900MHz core/1800MHz shader/2100MHz memory clocks.
Here's my gpu-z validation: http://www.techpowerup.com/gpuz/vkmaw/
And here's the 3DMark11 result: http://3dmark.com/3dm11/1437290
Till now I haven't seen any artifacts.. but only time will tell if it's fully stable.
The stock voltage on 1 card is 1.063v and the other 1.078v. And overclocking is done with EVGA precision since I don't want to change the voltage just yet. Might come later and will switch to afterburner then.
EDIT:
Decided to run Heaven benchmark for a longer time and had a driver crash
so back to 880MHz core
EDIT2:
After letting heaven run 3 times in a row I currently am at 850/2050 @ 1.075v on both cards using afterburner
Might push it further
Edited by Freaxy - 6/27/11 at 8:03am
Currently I ran heaven on extreme and 3DMark11 performance tests with 900MHz core/1800MHz shader/2100MHz memory clocks.
Here's my gpu-z validation: http://www.techpowerup.com/gpuz/vkmaw/
And here's the 3DMark11 result: http://3dmark.com/3dm11/1437290
Till now I haven't seen any artifacts.. but only time will tell if it's fully stable.
The stock voltage on 1 card is 1.063v and the other 1.078v. And overclocking is done with EVGA precision since I don't want to change the voltage just yet. Might come later and will switch to afterburner then.
EDIT:
Decided to run Heaven benchmark for a longer time and had a driver crash
so back to 880MHz coreEDIT2:
After letting heaven run 3 times in a row I currently am at 850/2050 @ 1.075v on both cards using afterburner
Might push it further
Edited by Freaxy - 6/27/11 at 8:03am
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I didn't have time to play with voltages yet so it's running at maximum default voltage clocks 825/1102/2204. Can't wait to see the score when I get this baby and the i7-960 under water and push both to the limits. 
