I have a BFG 8800GT factory OC and its been getting pretty hot to the touch. I checked the temp and it was at 79C idle. What percent should I run my fan? I have no problem running it at 100%, but will that damage the card running the fan so high all the time?
It will wear out the fan a bit quicker.
I would suggest you take the card out and give it a good blow through using a can of compressed air, and take a look t the PSU and CPU while you're at it, the PSU is often overlooked when cleaning a computer but it can get clogged with dust just as much.