Hi, i have a Corsair HX PSU 650W?

by the looks of things you should'nt be having problems with your ps. albeit, i have never used corsair, only rosewill and antec, but i still dont see how you could blow 2 of them! my setup is similar to yours but i have a 750 watt antec modular ps, but i find it hard to believe that 100 watts could make that much difference.