So I stopped OC my cards because some games like Crysis 2 kept crashing. Ofcourse a little more performance is always welcome so I've been playing Crysis 2 for almost 2 hours without it crashing!!!...I'm happy!!! Someone said to up the voltage when the game crashes, so I tought yeah why not.... and now my cards are OC 850/1700/1900 V=1.063 , the temps are max 85°C for top card whyle playing on ULTRA settings. So I hope this won't hurt the cards after a whyle considdering temps are fine??? well whoever is interested in OC his TRI SLI GTX570, this seems to work fine with driver 270.61 thanks for the tip!!!

yes they can handle the game on standard clock, but I do notice performance increase with this OC obviously. I bought these cards when I had a 24" screen, but as you can see in my sig, I have a 30" now, so I need more power to reach >60fps for this type of game...I probebly can lower temps with a fan profile, I use standard settings, I hear the cooling starts a little late...thanks!