You mean 80mm? Oh, nevermind, lol, you just converted it. DUH!
Yeah, I have a 350 watt power supply, a agp video card, wireless card, xp 1800, 80gb hdd, and 256mb ram. I have 2 case fans currently running, one is in the back and one is on the side, both blowing hot air out. I also have a fan in my power supply and on my heatsink, I have no problems yet. I'm sure that if I was going to start using every single one of my PCI slots I would need a bigger power supply, but fans are no problem.