I just bought a Asus EN8800GS card to fit inside my Dell E520. The comp has the standard 320 watt power supply installed, and the card calls for a minimum of 400. I've seen some posts around claiming that the Dell power supply is actually underrated, and that it will actually give enough power to run the card, but I'm just wondering if anyone actually has tried one of these little power supplies on a 400 watt card with any luck. Oh, and what's the worst that can happen if I plug it in to find out?