I am having Gigabyte P67A-UD5 from past couple of days. Well I am not able to POST my motherboard after inserting PCI video card. the computer is getting entered into a boot loop, powering on and off again and again. I am using couple of graphic cards to get the 4 monitor setup by making use of PCI-E and PCI video card. my system is getting POST only when Nvidia PCI-E 9800GT is inserted. However after inserting Nvidia 9400GS PCI or Nvidia 8400GS PCI boot loop is starting. As far as system specification is concerned I am having i7 2600k, 16GBCorsair Vengeance RAM.
Let me know if you are having any useful information to resolve the matter.