Graphics card overclock?

the cards idle temp should be around 25oc (degrees Celsius) in general it is a fantastic card... its comfortable operating temp is around 55oc no more than 60oc. people have clocked the card to 875mhz at a push with two fans installed on the graphics card. I wouldn't recommend this as it will stress your card. 840 to 850Mhz is a comfortable overclock for your card remembering not to exceed 60-65oc :)