Discrete graphics card not detected.

Question

First post.
System specs:
Mobo: MSI Z77A-GD55
CPU: Intel Ivy Bridge i5 3570K
GPU: eVGA GTX 580
PSU: NZXT Hale82 750W 80 Certified
RAM: G Skill Sniper Series 1866 8Gb DD3
SSD: Corsair Force Series GT 240G
For starters, I was running a CoolerMaster 1000W PSU and the eVGA 580 GTX in my old system. Upon upgrading, I transferred those units to the new system but can not boot up system with GTX 580. Onboard graphics work fine, so I went ahead and installed Windows onto the SSD with no problems. Once in Windows, I installed the latest Motherboard updates, and even flashed the BIOS to latest 1.4 build. Still no luck with the graphics card working on boot up.
Things I've tried:
- GTX 580 boots up and works fine (hence the system running now) on older Motherboard.
 -Ruling out a defective GPU unit.
- Both Coolermaster and NZXT PSU run the GTX 580 on older Motherboard.
 -Ruling out a defective PSU unit.
- Graphics card (GTX 580) would not boot up on ASUS P8Z77-V Pro Motherboard, nor the new one MSI Z77A-GD55
 -Possibly ruling out defective Motherboards.
- Replaced i5 3570k CPU with yet another i5 3560k CPU (Same issue)
 -Ruling out a defective CPU
- When using onboard VGA, I can get into the BIOS and the Graphics settings are set to PEG (PCI-E Graphics). Although when I shut down and install my GtX 580, still no boot up.
- Moved the GTX 580 between the 2 top PCI-E slots, to no avail.
- Moved 1 stick of RAM between the 4 DIMM slots and still not working.
-Reseated graphics card and made sure the 8-pin and 6-pin connectors were firmly intact.
I have done a lot of research, but have yet to find a definitive answer to my problem. I'm not ruling out a 3rd motherboard that may be defective, but I feel this is highly unlikely. Again, everything works and checks out in the system specs with the onboard graphics enabled.
I thought I'd try here to get some addition ideas from the group. Thanks for reading.

Answer 1

Quote from: HU16E on 02-July-12, 12:47:41
Try this; Shutdown, remove the discrete card, connect to the onboard, restart and boot all the way into Windows, restart to the UEFI/BIOS, change the graphics setting to IGD, save and enter, let it reboot into Windows, hard shutdown. Restart into UEFI/BIOS, change graphics setting to PEG, save and enter first, then hit the reset button and enter immediately back into the UEFI/BIOS checking to make sure the PEG setting is in fact set, then hard shutdown. Install the discrete card connecting all the power cables and monitor cable, start and see if it now boots into Windows with the graphics now working.
This merry-go-round procedure worked for me on 3 Z68's, no reason it won't work on a Z77.
I will try this procedure now. If it works, I will have to buy you lunch because I have NEVER heard of such hoopla!