I wouldn't worry about heat. All graphics cards cooling units, (Fans, heatsinks) should be plenty enough to cool the card. My 7900 GT idles at 56C!!!! (Overclocked by 60mhz) Alot higher then my 7800 which idled around 45c. (Overclocked by 50mhz) According to Nvidia settings, my card shutdown temperature is 120C. Sounds crazy but thats what it says. Only worry about heat if you overclock your card, or have terrible ventilation for your case, which I doubt. There is always a chance you have a bad card, but I doubt that as well.