Recently built a new computer, and after dealing with a faulty ram card and a faulty power supply, another issue has raised its ugly head. The second graphic card on my rig (specs below) is for some reason not being recognized by the motherboard. I have the latest AMD drivers and double checked to make sure the card itself was plugged in and actually works. Help solving this problem would be greatly appreciated thanks.
CPU: Intel I5 3570K
RAM: Patriot Extreme Masters Limited Editon 16 GB kit (2x8) 1 stick in currently
Motherboard: Gigabyte GA-Z77X-UD5H with WIFI
Power Supply: Corsair Ax 850W
Graphics Cards: 2 Sapphire HD Radeon 7970 3GB DDR5
look in your mobo manual to see if you have to change a jumper setting to enable crossfire. also try booting into safe mode and uninstall you graphics drivers and software, then reboot into normal windows and install the drivers fresh.