Right now, I have a thermaltake 430w with 18a on 12v and I was wondering if this will power either a 7900GS or a x1900gt. The recommendations on newegg tells me I need a strong PSU for both cards, no so much stronger with the 7900 but a lot with the x1900, but I've read a post on some other forum saying that he ran a x1900gt just fine with my exact same PSU, the one with 1000+ reviews on newegg