As long as it stays under 70C, your fine.
Originally Posted by corky dorkelson
The reason that the fan is not ramping up to a higher RPM is simple....the card is not getting hot enough to warrant an increase. If the GPU was getting to say 85C or higher, the fan would spin up to near 100%. GPUs can handle intense heat just fine, and most of the "auto" settings don't go full bore until 85C or higher. Your temps are just fine, nothing to worry about.
It can handle much, much more than that.
Originally Posted by PhaedraCorruption
Yup, it can. But tell me this: would you be comfortable letting your $250 card sit in 100C 24/7?
I sure would not.