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I have recently purchased a second HD6870 and each work perfectly individually. I put the second one it, plugged it into my cpu and placed the crossfire bridge across the two cards, upon starting up the computer, just before the login screen appears, I get the blue screen.
I restart the computer and get an error 'No AMD graphics driver is installed, or the AMD driver is not functioning properly' and the resolution has been reduced. I have the latest drivers installed and the lastest AMD Catalyst Control Center, in the program there is no option to enable Crossfirex. Asus M5A97 Motherboard AMD HDZ965FBGMBOX Phenom II X4 965 - 3.4 Ghz Sapphire 11179-09-20G HD 6870 1GB GDDR5 Graphics Card Corsair Vengeance RAM 8GB Corsair GS800 PSU. Have you tested both PCI slots on your motherboard with one GPU to make sure the second slot isn't messed up or shorting somewhere? I am now running the card in the bottom slot. A large black border has appeared around the edge of the display and the resolution seems to have been lowered.
If your not able to get that second slot to work normally then you might have found your problem. If that turns out to work fine than I am not sure what is causing the problem.
Maybe someone else here will have better insight. If your not able to get that second slot to work normally then you might have found your problem. If that turns out to work fine than I am not sure what is causing the problem. Maybe someone else here will have better insight. So would you say that the motherboard is the issue? I also forgot to mention that I only have 3.96Gb of usable RAM, most likely due to the fact that one of the cpu pins snapped off. Yes my first guess, if both cards run fine, would be the motherboard.
Your PSU looks like it should be plenty fine. I am not sure what kind of problems might arise from a snapped CPU pin, I guess it is possible they are related. If your not able to get that second slot to work normally then you might have found your problem. If that turns out to work fine than I am not sure what is causing the problem. Maybe someone else here will have better insight.
So would you say that the motherboard is the issue? I also forgot to mention that I only have 3.96Gb of usable RAM, most likely due to the fact that one of the cpu pins snapped off. Interesting i would suggest putting in a new pin or cpu, also do a clean install of drivers while in the bottom slot.