ok i have a vantec stealth 520 w power supply. i have a bfg geforce 6800 ultra oc, 3500+ athlon xp overclocked to 2.55 ghz and 2 512 sticks of corsair ddr memory. 2-2-2-5 sticks overclocked. ayway i have hard drives/cdrom drives, and tons of fans. the reason im telling you all of this is because with all this stuff running my power supplies fans dont even run!!!! all three fans are off. There is a switch on the back but no matter which one i turn it to (1,2,or 3) none of the fans come on. Now the wierd thing is the powersupply doesnt even get hot or warm for that matter. now my room is pretty kool, but i would figure the fans would always run for cooling purposes. Is it normal for them not to run even if its really kool in the room? it detects the inside of my case at about 29 degree's C. i just want to make sure i dont have a bad power supply? any idea's? ill check it again under a heavy gaming session but thought it run it past you guys on the forum.