Hello, I just recieved my iMac today, and spent most of the day installing everything. So before I go to bed, I installed a game which is fairly normal specwise. I know the iMac can easily handle it atleast. Anyway, so I play for like 5min, and suddently the fan starts to be alot louder. I think it's the gfx card, cause every time I tab out and leave it there for a min or two, it goes away, and when I return in for a few it comes right back on. I'm running my iMac i7 3.4 with 1gb gfx on an Bootcamped Windows. What can I do?