Hi, i just bought Nvidia 8800GTS 640mb and i have read several issue on heat problems..currently i dont have any special cooling device, and the only thing that i use to keep it cool is a normal fan..i live in Seattle btw, so not much of a hot day. Do you think a normal fan put at the back of the CPU is enough? my room temperature is on an average of 65F..i need comment and guidance..thanks so much..