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Xfire Not Detected

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Joined
18 Oct 2011
Posts
2,342
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.
 
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.

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
 
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.

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

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.
 
Still the same with 14.9 WHQL, one thing I did notice is though that when you uninstall the AMD drivers and reboot it automatically installs VGA controllers from windows and one fails.

Not sure if thats normal.
 
Does this mean anything?

nyfdyf.jpg


I have a new Crossfire bridge in now and still the same problem (The miss's treated me).
 
I have some interesting news, the option to enable crossfire in CCC appears if I use 13.9 WHQL driver.

**I noticed the second GPU fan was not spinning so I selected Disable crossfire and my screen went black with a static noise from the speakers. Once i restarted the second GPU is now spinning and seems to have crossfire enabled.
 
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switch the power cables from the working card to the none working card might be a faulty cable?
maybe use afterburner and disable ULPS.

I used Sapphire Trixx to disable ULPS (because the second card was running at 99% constantly, now solved).

In GPU-Z the second card is only running x1 1.1?

I don't know if this has anything to do with the 13.9 WHQL

Known Issues of The AMD Catalyst 13.8 Beta2 Driver for Windows:
•CrossFire configurations (when used in combination with Overdrive) can result in the secondary GPU usage running at 99%
•Enabling CrossFire can result in the PCI-e bus speed for the secondary GPU being reported as x1
 
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Just Happened, bsod 116 (Note, this was with crossfire disabled on CCC while I was playing a game that didnt support Crossfire)

On Tue 14/10/2014 20:55:08 GMT your computer crashed
crash dump file: C:\Windows\Minidump\101414-9126-01.dmp
This was probably caused by the following module: atikmpag.sys (atikmpag+0xAE80)
Bugcheck code: 0x116 (0xFFFFFA80113F0140, 0xFFFFF8800621FE80, 0x0, 0x2)
Error: VIDEO_TDR_ERROR
file path: C:\Windows\system32\drivers\atikmpag.sys
product: AMD driver
company: Advanced Micro Devices, Inc.
description: AMD multi-vendor Miniport Driver
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.
A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: atikmpag.sys (AMD multi-vendor Miniport Driver, Advanced Micro Devices, Inc.).
Google query: Advanced Micro Devices, Inc. VIDEO_TDR_ERROR



On Tue 14/10/2014 20:55:08 GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: atikmpag.sys (0xFFFFF8800621FE80)
Bugcheck code: 0x116 (0xFFFFFA80113F0140, 0xFFFFF8800621FE80, 0x0, 0x2)
Error: VIDEO_TDR_ERROR
file path: C:\Windows\system32\drivers\atikmpag.sys
product: AMD driver
company: Advanced Micro Devices, Inc.
description: AMD multi-vendor Miniport Driver
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.
A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: atikmpag.sys (AMD multi-vendor Miniport Driver, Advanced Micro Devices, Inc.).
Google query: Advanced Micro Devices, Inc. VIDEO_TDR_ERROR

*might be worth to note I did drop the Voltage from 1250 to 1200, so I have put it back to default just in case.
 
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