Hey guys so i currently have a nvidia geforce 480 2.0 graphics card and it only supports 2 displays at one time. I would like to either buy another geforce 480 and do SLI so i can have up to 4 monitors at one time or buy EVGA GeForce GTX 750 Ti and dedicate the 480 to physx. Which option is better? If i buy the 750 ti and dedicated the 480 tho physx can i still use 3-4 displays? Which is the better way to go for future upgrades?