HELP! No post or display with 2 different GPU's and 2 different PSU's but on-board WORKS perfectly

[fattyboydylan]

I have reinstalled fresh windows, reset CMOS, bought a new GPU, and bought a new PSU which has plenty of power. The on-board graphics work perfectly. Now, with my monitor plugged into either of my PCiE GPU's and my BIOS force defaulting to use my PCiE slot: if I plug EITHER GPU that I now own into the PCiE slot and plug BOTH six pin power cables into it then I get No POST and no display signal to my monitor at all but all my fans start blowing like normal. Now as soon as I unplug one (ONLY ONE) of the 6 pin power to my EITHER of my GPU's (I tried them out SEPARATELY, NOT a crossfire setup) then I get one long and 3 short beeps(unknown graphics card). When I unplug BOTH 6 pin power cables my computer starts up perfect with a nice 1 POST beep. Now here is where it is weird and might help solve the problem: When I have my monitor plugged into the onboard graphics and my BIOS force defaulting to my on-board graphics but have my graphics card in the PCiE slot with BOTH 6 pin power cords plugged in, I get the same thing (it will not POST or show display signal but everything in my computer starts up, CPU fan and GPU fans all start). If it is still set to on-board and hooked up to my on-board graphics but I unplug ONE of the two 6 pin power to my GPU it will start up just fine and on-board will work fine.

It does the same thing with 2 different GPU's ( 1 old and 1 brand new) and 2 different PSU's (1 old and 1 brand new)
Keep in mind this all started from atikmdag.sys file BSOD and driver errors from my video card

OLD PSU: Antec 550W
OLD GPU: Radeon HD 6870

New PSU: Cooler Master V750 750W
New GPU: AMD R9 380 4GB

MOTHERBOARD: GIGABYTE Z77-D3H IVY BRIDGE
CPU: INTEL i5 3570K
8GB RAM
WINDOWS 7 PROFESSIONAL

What else could it be, a motherboard problem?

 

[cin19]

Just like you said all started from atikmdag.sys file BSOD, which related to the GPU driver.

Take the AMD GPU out, use the onboard intel iGPU, and you may go into the BIOS to reset the setting to "auto" in the graphics section, using the DDU to uninstall the AMD GPU driver in safe mode, ( DDU http://www.guru3d.com/files-details/display-driver-uninstaller-download.html ) , also use the CCleaner http://www.piriform.com/ccleaner to clean your PC before you plug the AMD GPU in and reinstall the AMD GPU driver.

 

[fattyboydylan]

Thanks for the reply, I have used the newest version of the driver uninstallation tool and cleaned up with Ccleaner including the registry and it is still doing the same thing. Keep in mind I wiped and fresh installed windows before all this.

 

[cin19]

If the pc is doing the same, why do you select my post as "best solution"? I will deselect it.

May try update the chipset driver https://downloadcenter.intel.com/download/20775 , make sure it is not the software problem, because it comes with the pcie controller driver, If you still have problem, that means the problem is from hardware, wither GPU or MB ( pcie slot).

 

[fattyboydylan]

I accidentally clicked best solution but did not know how to take it off, my bad. Anyway I installed the chip set update, restarted, and same thing happens. Also I have 2 pcie slots on my motherboard and I have tried both slots but no difference.

 

[cin19]

You can use only on board intel iGPU, right? Last to try that is update the BIOS. after that if you still have that strange problem, I run out idea. But I think the problem is from the MB. And you may go to local PC shop ask for help to make sure the MB does or does not have problem before buy the new one.

 

[fattyboydylan]

Flashing the BIOS to the newest version has fixed the problem.... Wow, thank you for the help