Thats great man , I'm glad I could be of help and that the PSU you have didnt do damage to your system. Definately let me know how you go , that 850Watt PSU will last you a long time and keep your system and SLI happy.
Sorry for the delay in getting back to you. So I bought the AX850 and had no luck with that, but I'm glad I replaced it, given the information you provided me.
I ended up replacing the i5 660 with a new i5 3570K and am now getting scores comparable to benchmarks online. I'm really happy with the hardware now! My specs are the following:
Mainboard: MSI Z77A-G45
CPU: Core i5 3570K
RAM: 16GB Corsair Vengeance (4x4GB, 1600)
GPU: Galaxy GTX 680 2GB
PSU: Corsair AX850
Chassis: NZXT Phantom (White)