I just built my first computer and I am running windows 7 64 bit and I have been experiencing some issues with my 5770. Everyonce in a while the system will crash and reboot right after the fan on the video card seems to spin up to 100%. I currently am running slightly older drivers because I have heard that the new drivers are completely terrible. I was wondering if these problems are known to happen with older drivers and will be resolved once proper drivers come out or if my card is messed up and it should be RMA'd