Computer graphics help please?

NVIDIA has a technology called SLI that allows specific nvidia cards to work together on one motherboard. AMD has something siimilar but they call it CrossFire. If your card is SLI ready ( and i think yours is if i remember ) then yes you can provided their are no problems with the rest of the system ie no open slots, power supply needing to be upgraded to support it etc. Look into your cards specs and see if it says SLI ready then you can move forward.