First off, well done, you've got a card with the best warranty and service available (in the US/Canada anyway).
Don't forget to REGISTER the card with EVGA! Do it now, really, I mean it.
Nvidia use their Boost 2 program (in the card BIOS) to limit temperatures to 80C, anything under that is good although the card will survive 100C and will shut itself down at, I think, 105C to prevent damage.
Keep an eye on the fan speed, fan speeds will rise over time while the temperatures stay much the same and indicate the card is becoming dirty, it should be given a clean out using compressed gas every so often, when varies, but once a year if you've a case with well filtered intake fans, more often if the fans are not filtered and regularly if...