First this needs to go in the altcoin forum not the bitcoin forum section.
Try this command "lspci |grep VGA" and see how many cards are showing up. If theyare not you may have bad risers or a misconfigured bios.
ok sorry and i see this
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Device 67df (rev c7)
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Device 67df (rev c7)