Hi, My side fan on my case is pretty noisy, when I unplug it my PC is very nice and quiet. The other day, after I had got my PC stable etc. I booted up and did some tests like running alot, play games and also did a test on seeing what it would do if I put 100% on the CPU. Well... the temp shot up to 70C so I stopped that and it went back to nice, normal temps. I was finding when I was doing stuff like spyware scans it would get very hot and the CPU fan would spin up and down, up and down. I did fix this problem by plugging my side fan back in, if you put your hand over the grill thingy on the side it sounds like a hoover... you can imagine how noisy that is! I have checked my HSF and that's all firmly on, I also have 2 other back fans taking out air. Anyway, I just wondered why this could be getting so hot? My spec is 3.0GHZ, 1GB RAM, 200G SATA HDD, Gigabyte 8IPE775-E. My brothers spec is 6800GT, 200GB HDD, 1GB RAM, 3.4GHZ and all that has is a heatsink fan... and mine gets too hot with heat sink fan AND 2 back fans. Any ideas why this could be? Or are Intel 3.0GHZ CPUs this hot? --edit-- Oh, also my Dad is a super multi tasker, at peak he runs around 1GB worth of stuff, idle browsing etc. he runs around 600MB, he has a 3.4GHZ E, 1GB RAM, ATI 9550 I think and he also only has a fan on the heatsink, none others and his PC doesn't overheat or anything. Craig.