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Xfire Not Detected

Loxa

Loxa

Loxa

Associate
Joined
18 Oct 2011
Posts
2,297
Hey, I have recently added a second 7950 to my rig while pondering on what new SLI setup to get but for some reason the second card is not being recognised in CCC. I have reinstalled the new beta driver etc

In device manager I do see x2 AMD Radeon HD 7900 Series.
 
Loxa said:
Hey, I have recently added a second 7950 to my rig while pondering on what new SLI setup to get but for some reason the second card is not being recognised in CCC. I have reinstalled the new beta driver etc
Click to expand...

Please check the card is securely seated in the pci-e slot and you have both power plugs connected to it.

Go to device manage and see if the card is physically being detected by windows. If not, try the card in the first pci-e slot to make it's working ok.
 
AMDMatt said:
Please check the card is securely seated in the pci-e slot and you have both power plugs connected to it.

Go to device manage and see if the card is physically being detected by windows. If not, try the card in the first pci-e slot to make it's working ok.
Click to expand...

I just edited my post before I saw your reply lol :), they are both recognised by windows.

AMD Radeon HD 7900 Series
AMD Radeon HD 7900 Series
 
Loxa said:
I just edited my post before I saw your reply lol :), they are both recognised by windows.

AMD Radeon HD 7900 Series
AMD Radeon HD 7900 Series
Click to expand...

I presume you have a crossfire bridge connected to the cards? Do you have another bridge you can try just incase the first one might be faulty? Other than that I'd recommend a full uninstall of the current drivers, restart your pic then download the latest 14.9.1 drivers and the second card should be detected.
 
AMDMatt said:
I presume you have a crossfire bridge connected to the cards? Do you have another bridge you can try just incase the first one might be faulty? Other than that I'd recommend a full uninstall of the current drivers, restart your pic then download the latest 14.9.1 drivers and the second card should be detected.
Click to expand...

Unfortunately I do not have another crossfire bridge, I uninstalled the drivers and updated to the latest beta a few minutes ago.
 
Loxa said:
Unfortunately I do not have another crossfire bridge, I uninstalled the drivers and updated to the latest beta a few minutes ago.
Click to expand...

If the bridge is faulty that could explain why there is no crossfire option. I happen to have a spare one laying around on my desk i can send you to if you would like it.

Have you checked both cards individually to make sure they work?
 
Yeah both cards work fine alone, kind of annoying as the crossfire bridge I am using is from a 6850 I had a while back which was never used.
 
Loxa said:
Yeah both cards work fine alone, kind of annoying as the crossfire bridge I am using is from a 6850 I had a while back which was never used.
Click to expand...

If you want it, just drop me your address via a trust message.

Do you have anything else in the pci slots? If you do perhaps try removing it to see if that has any effect. Might also be worth ensuring your motherboard bios is up to date as well.
 
I have sent you a trust, much appreciated :). Nothing in any of the PCI slots & my motherboard is up-to-date also.
 
Not sure if this is any help

ogm7na.jpg
 
Loxa said:
I have the options of

PCIELINK2 - Gen 1/Gen 2/Gen 3

PCIELINK3 - Gen 1/Gen 2/Gen 3
Click to expand...

Can you try both cards on GEN 2 just to rule out a problem with the board? I assume you're using the two slots I've marked in the picture?

DTLnVUJ.jpg

If you still can't get this working I will raise it as an issue with my team. They will use the same motherboard and a similar system and will then be able to provide better help than i can. Can you please upload a DXDIAG report to SendSpace and share it here with me? Thanks.
 
Loxa said:
Yes they are the PCIE slots I am currently using, I think this is right but I am not sure I have never used SendSpace before.

https://www.sendspace.com/file/uyi9sh

*Oh sorry almost forgot, still doesnt give a crossfire option while running both slots at Gen2.
Click to expand...

Thanks Loxa. I've subscribed to the thread so i will keep an eye on it. Lets wait and see if the new bridge fixes the issue, if not i will raise it and we'll go from there.
 
shankly1985 said:
Try running DDU "Display Driver Uninstaller" After it creates system restore point, you be asked to boot into safe mode, select yes.
Now select AMD and run the Recommended setting, system will auto restart and now you have default windows video "Big icons"

Now install 14.9 WHQL report back.

DDU
http://forums.guru3d.com/showthread.php?t=379505
Click to expand...

I do this every time I reinstall a new driver

Uninstall AMD C Install Manager (express)
Reboot
Safe Mode
DDU
Reboot
Install new driver
REboot

I have not tryed 14.9 again yet though so it might be worth a try maybe.
 
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