well it's not important but just wondering how much power does 8800 gts 320 consumes. i have EVGA 8800 gts 320 MB superclocked. i know pci express can supply max 75 watts and the 6 pin adapter too can supply 75 watts max. so it can't be over 150 watts. but it is over 75 watts for sure lol
Back to the original question...
I have a kill-a-watt meter on my PC (not extremely accurate but it's close). Running Prime95 on both cores, my system draws between 175-180 watts. While playing battlefield 2142 at high rez, it draws between 235-245 watts. That should give you a rough estimate.
2x1GB DDR2-667 4-4-4-12
Seagate 320MB 7200.10 SATA
Sound Blaster 2 Audigy
eVGA 8800 GTS SC 320MB
Ultra V500 PS (28A on single 12v rail)
I should also add (for power consumption calculations) that I don't have any fashion show crap like LED fans, color case lighting, etc.