I have tried a windows USB keyboard and a PS2 keyboard with no difference in the result
I have verified that both GPU cards function properly independently (no duds).
I have verified that using two power supplies does not work. I read that the 7990s draw 570W under max load. so I'm guessing that I need 1300W? not sure how much headroom I need...
I attempted to access the BIOS with one GPU card several times with no difference in result.
I assumed that the motherboard supports 2 double gpu cards since I called tech support and they didnt raise any red flags when I said I was trying to run two cards. I thought that most computers accept up to 4 gpu chips but I could be mislead.
Last night I exchanged the GIGABYTE motherboard for an ASUS M5A97 LE R2.0 and I have run into the exact same problem yet again. I am now suspicious that the computer is entering the bios set up menu but the 7990 is not displaying it. unfortunately, i don't have any spare GPUs to test this theory.
Furthermore, the asus motherboard is giving me trouble trying to install windows 7 64-bit. When the install is beginning it asks for a storage device but it never recognizes the hard drives that I connect (I tried 3 of them, all formatted NTFS). It then says I can load a driver for this but I cant figure out what driver it is. I loaded up the ASUS CD that the motherboard came with but none of the folders had any drivers that were "recognized". Do i need to have the hard drive connected when I boot up?
Just in case, I took out the battery last night and used the onboard jumper to clear the RTC RAM for 24hours. I'm hoping this will help with the BIOS and windows installation... but based on my luck with this build, I doubt it.
Thanks again for your support guys! Really appreciate it.