I am trying to crossfire two Gigabyte 7950s with my AsRock z77 extreme 4 motherboard. I plugged both cards in (with and without the crossfire bridge) and every time I boot I get stuck in an infinite bios boot loop. The bios splash screen flashes and the reboots and I never get into windows. My machine boots to windows fine with one card ( doesn't matter witch card or which PCI Express slot. )
I called Microcenter and they suggested that i swap my Thermaltake smart series 750watt power supply for a larger one. So i picked up a Corsair TX850M but it still doesn't work.
I have the latest bios version froma Asrock for the extreme4 (v1.80) I have also tried uninstalling all catalyst drivers and booting to onboard graphics. If both cards are plugged in and I am using onboard graphics the machine goes into infinite loop.
Also I can get into bios and view the system browser. If I have both cards plugged in they both show up as being detected in the pci-3 slots so I don't think it is a bad slot/card.
Is there some bios setting I am missing here. I have checked the North bridge configuration and graphics is set to PCIE
Does anyone have any idea on what to do. I am thinking its a bad motherboard. If this is the case, I find it odd that both PCI express slots work fine though. Is there anything else I can try before I take the motherboard back.
Full specs are bellow:
Corsair 600t Corsair H80 Corsair Vengeance 16GB DDR3 Corsair Force 3 SSD Corsair TX850M Gigabyte 7950 Windforce x2 AsRock z77 Extreme 4 Intel i5 3570K
I called Microcenter and they suggested that i swap my Thermaltake smart series 750watt power supply for a larger one. So i picked up a Corsair TX850M but it still doesn't work.
I have the latest bios version froma Asrock for the extreme4 (v1.80) I have also tried uninstalling all catalyst drivers and booting to onboard graphics. If both cards are plugged in and I am using onboard graphics the machine goes into infinite loop.
Also I can get into bios and view the system browser. If I have both cards plugged in they both show up as being detected in the pci-3 slots so I don't think it is a bad slot/card.
Is there some bios setting I am missing here. I have checked the North bridge configuration and graphics is set to PCIE
Does anyone have any idea on what to do. I am thinking its a bad motherboard. If this is the case, I find it odd that both PCI express slots work fine though. Is there anything else I can try before I take the motherboard back.
Full specs are bellow:
Corsair 600t Corsair H80 Corsair Vengeance 16GB DDR3 Corsair Force 3 SSD Corsair TX850M Gigabyte 7950 Windforce x2 AsRock z77 Extreme 4 Intel i5 3570K
