hey all, i'm building a new comp and i'm considering a gtx 260 but i havn't figured out the real power requirements. i'm not getting SLi to start with but i will be upgrading to it in 6 months. so, what wattage do i need in a power supply and what amperage along the 12v rail do i need, i've seen some PSs with 40a+ on the 12v but they only have 1, do i need more? all the PSs that i've seen with multiple 12v rails seem to have around 18a max. what i'm planning on running: 1 7200 system HD, 1 or 2 5400 storage drives, 2 gtx 260s, 1 sound card (turtle beach probably not sure yet), 1 wi-fi card, E8500 (wolfdale) core 2 duo, DDR 3 ram (4 gig, 2 sticks, pc 1600), 1 DVD/r, 3-4 case fans. not sure which mobo yet but probably whatever EVGA board that can handle the DDR3. not planning on any case mods that use power and i have an IPS for consistant incoming power.