Download furmark, open your CCC and monitor your temps/fanspeed run furmark in a window. What does temp and fanspeed go to. If over 65 and fanspeed is low, up it to bring the temps down. For Idle I adjust fan speed for min temp while not having the fan to load. For load I try to keep around 60->65 C. But even 70c possibly 80 C is OK.
I downloaded and ran the Furmark benchmark test. With the system handling the card's fan speed, the temp maxed out at 64C with the fan speed going to 42%.