i've had mine at 300/550 for over 24hrs and it was doing ok. I havent tried setting it higher than that, due to it is good to go at those settings. I maybe will try to increase some more and see what go from there. btw, mine isnt a gainward.
if you have any nvidia-based card, use coolbits! i don't understand why people insist on using powerstrip because it's a third-party program that must remain running in the background. coolbits, on the other hand, is merely a simple registry key (104 bytes) that unlocks nvidia's own overclocking utility which is inside the drivers. no other programs running in the background.
just install the reg key, restart, and go into your driver settings and there will be a "clock frequencies" tab for your enjoyment. have fun.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS