AMD CrossFire option not showing up in CCC

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Cody Sommers

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Jun 9, 2014
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Hardware that seems relevant:

  • Video cards - Powercolor 7870 HD Myst Edition (Tahiti LE) x 2
    Mobo - ASRock Z97 Fatal1ty
    PSU - 750w
Things I have done to try and resolve this:

  • Uninstalled drivers/CCC
    Uninstalled display adapters and let windows find the cards
    Updated BIOS
    Checked BIOS for CrossFire setting and can't seem to find any option that would help
    Reseated both cards
    Swapped card slots
    Can't plug the Bridge onto another slot because there is only one on these cards
    I've tried the newest normal and beta version of the drivers...maybe I should go farther back?

I feel like I've tried everything that I can think of and from what I can google, so now I'm here. :|
 
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CGurrell

CGurrell

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Feb 3, 2014
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A few things:

Just to be sure, have both cards got the same amount of VRAM?

Someone recently said that their bridge had to be slightly less than all of the way on to work properly, could try that

It sounds to me like a faulty bridge cable (Failing my other 2 suggestions), so if you could find another one of those then try that (If anyone you know has bought an AMD card then they should have one)
 
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Cody Sommers

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Jun 9, 2014
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@i7Baby - The PSU is Coolmax CUL-750b and should be compatible.

@CGurrell - They're the same exact cards. The bridge is brand new and I've tried the second, since I have two. I'll try the whole, "not on all the way" bit, but that sounds sketchy.
 
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mills87

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Dec 31, 2014
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So I've got the same problem with my two 7970's. This is a very. Common problem since 14.4 release. To fix this completely erase all and drivers. Roll your drivers back to an older version. Say 13.12 or something. This will usually remedy the problem. Crossfire will now be available again. Now from here go to catalyst uninstall manager. Do a custom uninstall. Uninstall only the display driver. Leave everything else. Now install the latest GPU driver compatible with your gpu's. Make sure to do a custom install and Install the display driver only. You should now have crossfire option with the new driver you want to use.





 
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mills87

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Dec 31, 2014
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Knew it wasn't a hardware issue as I was running windows tech preview 64 bit and xp 64 bit dual boot. Crossfire works awesome on tech preview with omega drivers. Completely even GPU utilization with mantle. Now the newest driver for xp 64 bit is 14.4. No crossfire option. Rolled back to 13.12. Had crossfire option. From there I uninstalled the 13.12 display driver by itself. Rebooted. Then installed the 14.4 display driver. Worked for me. Your basically using an older CCC with the newer driver. Hybrid driver technology. What AMD should call it. Lol.



 
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