Yip, update the motherboard BIOS. I noticed they have updated the AHCI hard drive code in the BIOS. Maybe there was an issue with Windows 7. Then install Windows 7 with only 1 card installed. If it completes, run Windows Update to install all the patches. Install chipset
drivers. Install Directx Feb 2010. Then install latest Cat drivers. Now shut down and install second card with bridge and power. Reboot and windows should install drivers for 2nd card and update ccc for a xfire install.
GA-X48-DQ6 - GIGABYTE - Support&Download - Motherboard - BIOS=