I just recently upgraded my PC with a 650 Corsair psu and a Geforce 9800gtx graphics card but my box is getting pretty hot especially the top near my psu.
If you look at the picture I have 2 possible places for a fan.
1) Back of case
2) Side of case (directly opposite of the cpu fan)
Other threads have said bring air in and take air out but i dont know if that is possible here. The side opening will just push against the cpu fan, which could be fine, and I do not want to take air out from the back because it is in a warm corner with the other exhaust fans back there.
http://www.flickr.com/photos/39791424@N03/3658544611/
Let me know what you think! Thanks