Hello, I have a GeForce GTX 560 Ti SuperClocked 1024MB, i am wondering if i can buy the GeForce GTX 560 Ti - 448 Cores (Fermi) Classified Ultra 1280MB and SLI the two of them, I was thinking i would want the 448 cores in the main slot and the other one as secondary but im not sure if they can work together or not. Thank you for your time