The Incinerator
Human Spambot
You mainboard supports crossfire but not in a full fledged way. Your 1 Pcie slot runs a t 16x while the other at 4x when in Crossfire. Though technically you can go Crossfire but its worth wont be the money you are spending on the second card. In simple terms quite a waste. Better get a single powerful GPU. But whats your budget after you sell off the existing card?