this system as follows: i3 2100 ga67a 1333 4gbx2, 2gbx2. gf460 1g 7200rmp 1gb 3 case fan I have some power problem, i used a evergreen(a japan brand) 425w psu on it, at max load in crysis2 12v drop from 12.1 to 11.71to 11.79 recorded from ET6. then I put a kiean 450w psu on it, max load of 12v drop from 12.2 to 11.6 from ET6. then I put a coolermaster 500w psu on it, max load of 12v drop from 11.95 to 11.5 recorded from ET6. i know software dose not have a accurate reading but how come bigger psu have a lower 12v at maxload of the gf460 card. I think 425w is not enough for this system, but how come 425w has a lower drop than 500w psu.