I am looking into a system with an i5 750 core and a GTX 460 (768 MB version). The PSU I'm interested in is the OCZ ModXStream Pro 600W. My concern is the amperage - unlike the more expensive Corsair 650W, the OCZ pushes 25A down each of two 12V rails. Will this amperage be sufficient for my graphics card needs? I do not intend to SLI this card ever.