Well don't always count on the PSU calc after all what your Kilowatt meter takes is AC load you loose at least 20%(more like 25-30) of your power to losses and heat in the psu.
If that sucker is SUPER efficient
your system is only taking about 200watts at load. Welcome to the world of knowing that computers do not need 1000watt psu's
2 Systems, router(~10 watts), switch(~10 watts), modem(~10 watts), speakers(~15 watts at current volume, gets out of hand when its cranked), screen(30 watts)
folding running 3dmarks 2005
CPU Q6600 @ 3.0
P35 DS3R Board
2x 1gig sticks of ram @ 1.8 volts(every bit counts no more 2 volts for me, gonna get 2 more sticks of that ram)
6 Hard drives (2x 250, 2x 320, 2x 500)
1 ODD
SB Audigy 2zs
WinTV PVR
Geforce 8800GTX(factory OC 600core 1400shaders 900[1.8ghz effective] ram)
Antec 900 with full set of fans (4 x 120mm low and 1 x 200mm low + cpu cooler 92mm fan 2200rpms)
Folding
XP 1800+
K7S5A 3.XX
512MB ram
120gig HDD
Geforce 4 ti4200(have to remove it as there is no use on a web/music machine, back to the TNT2 or maybe VirgeDX
)
2 ODD's
P133 Case with 2 80mm(under volted) fans and 70mm(under volted TMD fan) CPU cooler
Thats all at the plug. so even my quad/8800 system is not that hungry.