Actually, the 6800 isn't as bad as you think. MaximumPC connected a number of PSUs - PCPowerandCooling 410 and 510, respectively, Sparke Power 400, SFF 250, generic 400 - and found that the last two crapped out. All else were unaffected and ran just fine. See, Nvidia recommends a minimum of 480 Watts of power. After said comparison, MaximumPC believes they meant a generic 480W PSU.