Hi all,Ive got a Dell Inspiron 580 comp,Intel Core I5 CPU 650 @ 3.20 GHz with a standard 300 watt P/S. Im trying to figure out which Graphics card I need to play Witcher 2. Currently Ive got a weak nVidia GeForce GT 200 card and it just barely works.many of the cards Ive looked at require at least a 400 watt P/S. My problem is Ive heard you cant really replace ps's on a dell cause of the nonstandard components they use. Any help would be greatly appreciated! Thanx.