I still have a pretty new system it's about a year old. I am currently running the EVGA GTX 660 along with the motherboard ASROCK Z77 Extreme4. I was wondering if with all these sales it would be better to just go on ebay and buy another EVGA GTX 660 and do SLI, if so how much would my fps increase? Or just buy a new graphics card which could cost me 200+ im guessing?