http://www.upgradingandrepairingpcs....ade3_01_01.asp
"If you do decide to upgrade the motherboard in your Dell system (purchased on or after 09/98)_then there is a simple solution, just make sure you replace both the motherboard AND power supply with industry standard ATX components at the same time. That way nothing gets fried, and you'll be back to having a true industry standard ATX system. If you want to replace just the Dell motherboard, you're out of luck unless you get your replacement board from Dell. On the other hand if you want to replace just the power supply, you do have one alternative. PC Power and Cooling now makes a version of their high performance 300W ATX power supply with the modified Dell wiring for about $110" quote