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Crossfire suddenly not working?

Sacrifice

Sacrifice

Sacrifice

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Joined
26 Oct 2013
Posts
365
Ran Shadow of Mordor, AB showed one card at 300mhz. I toggled crossfire in CCC, no luck. I reset my pc, no luck either.

So, I have no idea why it isn't suddenly using crossfire considering it was working the last time I played it a few months ago, any ideas?

EDIT: Just tried with a few other games, seems to not be working on any games.
 
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Sacrifice said:
Ran Shadow of Mordor, AB showed one card at 300mhz. I toggled crossfire in CCC, no luck. I reset my pc, no luck either.

So, I have no idea why it isn't suddenly using crossfire considering it was working the last time I played it a few months ago, any ideas?

EDIT: Just tried with a few other games, seems to not be working on any games.
Click to expand...

Check that CrossFire is enabled in CCC and ensure you're running each title in Exclusive Full Screen Mode. When the game is running press Alt + Enter to switch between the various Full Screen Modes. This should enable/disable CrossFire if all is working as intended.
 
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AMDMatt said:
Check that CrossFire is enabled in CCC and ensure you're running each title in Exclusive Full Screen Mode. When the game is running press Alt + Enter to switch between the various Full Screen Modes. This should enable/disable CrossFire if all is working as intended.
Click to expand...


Crossfire is on in CCC. When I tried again (checking using alt+enter), one card wasn't reading at all in AB, but after checking GPU-Z it seems one was in ULPS (must have miss clicked at some point).

Then I disabled ULPS in AB, tried again, and the issue still persists.

EDIT: Any ideas/help anyone has would be appreciated, would doing a driver reinstall be advised?
 
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shankly1985 said:
All else fails you might after take bottom GPU out and install alone to test.. Gpu might have died :(
Click to expand...

It's showing at idle clocks, and sometimes changes from 300~320mhz. It's acting like it's in low power/non-3d clocks.

Also that one stays at 0.9-- on voltage, the other one does too, until it gets into the game when it goes to 1.2 or somewhere around there.
 
Sacrifice said:
It's showing at idle clocks, and sometimes changes from 300~320mhz. It's acting like it's in low power/non-3d clocks.

Also that one stays at 0.9-- on voltage, the other one does too, until it gets into the game when it goes to 1.2 or somewhere around there.
Click to expand...

If it's not a hassle I would take it out and test alone just to make sure it's working correctly. You can then go from there if it does work.
 
shankly1985 said:
If it's not a hassle I would take it out and test alone just to make sure it's working correctly. You can then go from there if it does work.
Click to expand...

I'll probably do that later today, as my case is pretty tight with the two cards with pumps etc. I assume I'll need to test the non-primary card(the one that is idling) in the top slot? Or could I just pull out the top card and put a cable in and see?

I also completely uninstalled and reinstalled drivers and updated AB, no dice.

Also, forcing constant voltage I thought was meant to ensure 3d clocks? I've done that and one still idles.
 
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Okay, back from testing each card separately... and they both work as normal in each pci slot.

Unfortunately I can't test the cards in crossfire the other way around due to the length of the h55 tubes. But I wouldn't want to do that anyway as the bottom card has/had terrible coil whine when running the display.

So this leads me to believe the problem is something to do with software? Am I correct in that analysis?

The problem seems to be that the bottom card, even with crossfire enabled in CCC, showing as enabled in gpu-z, and ULPS and Force contant voltage enabled in Afterburner, still does not go out of idle clocks of around 300Mhz. - This is even after uninstalling using program manager and reinstalling the drivers. Yet the card works as normal on it's own!

Help would be appreciated as I'm completely at a loss, especially after testing each one separately- such a pain! :mad: :mad:
 
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