Building a new system, the mother board is the Gigabyte GA-X79-UD3 with F7+ Bios version.
The Graphics card is the Gigabyte GV-N680OC-4GD.
At power on, the system hangs on the BIOS splash screen, it is non-responsive to keyboard input. after a minute or to, a blank screen with a flashing underscore is displayed. The underscore flashes quite fast.
If no boot media is present, it will eventually display the "no boot media" message, though the B's are missing, so it reads something like "no oot media".
I replaced the Gigabyte GV-N680OC-4GD with the Gigabyte GV-N670OC-2GD and it booted perfectly. Also tried a Gigabyte Radeon HD 4000 series Card and it again booted perfectly.
This is where it get's annoying, I put the Gigabyte GV-N680OC-4GD into an ASRock mother board (where the Gigabyte GV-N670OC-2GD came from) and it worked fine.
Any ideas what could be wrong?
The Gigabyte GA-X79-UD3 supports PCIe 3.0.
Here is a list of things I've tried, most of which is redundant since the mother board boots with diffident Graphics cards:
- swapped out known good RAM
- removed BIOS battery over night
- removed SATA drives
- removed all accsesorys (audio, usb, etc..)
- moved the Gigabyte GV-N680OC-4GD to all PCIe slots
Here is the full system list:
- Gigabyte GV-N680OC-4GD
- GIGABYTE GA-X79-UD3
- Intel Core i7 3930K
- G.Skill - F3-19200CL10Q-32GBZHD (4x8GB) 2400Mhz DDR3
- Antec 750W High Current Gamer Power Supply
- Intel 240GB SSD, 520 Series
My only theory is that it is under-powered, possible? I don't have a higher powered PSU to check though.
All help is appreciated!