We have quite a few extremely talented IT folks here and I am hoping someone can help me solve a problem that Gigabyte has no answer to.
I am running a Gigabyte GA-X58A-UD3R(rev. 2.0) with 12Gb on 6x sticks of Corsair Ram. I have two video cards: a Gigabyte Radeon 6850 and Radeon 6870. There are no other plug in cards and I am using a single Crucial M4 256Gb Drive. With a Corsair 750W power supply. Running Windows 7 64bit Ultimate.
I am wanting to use both videos cards in the system. Using the 6870 to drive a single monitor that I would use for gaming, and the 6850 to drive 2 monitors for work and applications. I can get the system to boot with either card but it fails to boot when both cards are inserted. I tried the cards 6870 in pcie 1 and 6850 pcie 2 and I have flipped them around and they both fail to boot with a beeping sound.
I have tried loading other OSes and putting in the cards with drivers loaded and without drivers loaded, but I am assuming there is an IRQ or some other collision occuring. I have also booted each card individualy in each PCIe slot.
Just for giggles and to rule out every possible issue I ran memtest x86 for 3 iterations and it found nothing, I ran several scans on the hard drive and it is also fine. I have tried booting with XMS enabled and disabled. I am not overclocking or using any custom multipliers. And no, I am not trying to run them in a CrossFire setup.
I do not have another board to test this with but I am truly stumped. I have other online friends who are running similiar configs with different MB and video cards, but they are using 2 different cards with three monitors.
Any suggestions or advice would be greatly appreciated.
Cheers