As far as I know, 65 to 75 is still quite within acceptable limits for GPU temps.
I haven't really noticed at what temps my GPU runs when I game, but I think it maxes out at about 70 degC. The highest I want to see my GPU at is 80 degC, and then not for too long.
Joker will probably be able to give some better input though. Sure he will reply here, otherwise perhaps just send him a PM.
