I have two HIS 7850's installed but the crossfire option is not appearing on AMD CCC.
The computer recognises them both, as it shows one is enabled adapter and one is disabled adapter.
I have already tried to reinstall the drivers but with no luck.
GPU: 2x HIS 7850's stock clock
CPU: intel i5 3570k stock clock
Motherboard: Asus P8Z77-V LX
Power Supply: Corsair HX 650W
RAM: 2x 4gb Corsair Vengeance DDR3 stock clock
SSD: 120 gb Sandisk
HDD: 1TB Corsair Black
Any suggestions would be greatly appreciated.