I am having an issue where when using a VGA connection on ATI HD5450 add in graphics card causes system not to post. I can typically get it to post with DVI connection but then I am getting error code 12 when I do a reboot from windows. At this point I am not sure if I have faulty
motherboard or incompatibility of graphics/motherboard. I have other systems with the same configuration working fine, so I think it might be a motherboard issue.
Motherboard: Intel DZ77BH-55K bios rev.0099 (using intel toolkit) bios graphics setting set to Auto - tried to force EXT PCIe graphics and same result.
Graphics Card: Sapphire HD5450 AMD catalyst
control suite version 13.1 and 13.4 tested with same result.
Chipset version 9.30.1036
S12II-620 Seasonic Power Suppply
To get the system up after the reboot lockup, I have to force a restart from front panel button of the chassis and then the system will post and boot into windows. If we use onboard graphics driver version (9.17.10.2932) I don’t have any issues with initial boot or restart command from Windows.