i bring you nub to this link http://extreme.outervision.com/psucalculatorlite.jsp
for all of your psu/watt/amp calculating needs. This calculator seems to overestimate by ~2-6% in 3 of 4 of my machine specs, or theres something wrong with mah own calculator orz. GTX280 isnt listed as an available option for lite yet, but add 280w's to the calculation input, leaving videocard 'empty.' Yes, the GTX280 will draw ~280w MAX under full stress. While playing max options on CoD4(and running torrentsorz), in the middle of a huge fire fight and airstike is happening in mah face the system was recorded to be drawing a peak of 530w's.
For reference. http://www.newegg.com/Product/Product.aspx?Item=N82E16814121252
runs well with a http://www.newegg.com/Product/Product.aspx?Item=N82E16817139001
This system is:
-2x2GB 8500DDR2 cas5
-1 x dvd-rw
-4 x SATA HDD
-3 x 220cm led case fans
System DOES NOT fault due to power strain. Nothing is overclocked, not even manufacturer overclocked. If your going to overclock everything like a mad scientist, step-up to http://www.newegg.com/Product/Product.aspx?Item=N82E16817139002
I've purchased an evga GTX 260 $399 stock stock stats in hopes of lowering power consumption. Should be in a box floating to mah doorstep by now.
Young scholars! READ NOWZ http://techreport.com/articles.x/13271
EDIT: i fail at pasting links.