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Crossfire not working, after windows 10 upgrade - Page 4

post #31 of 38
im running 2 r9 290's and im getting the same issue and when i look at afterburner only 1 gpu is being used but in ccc crossfire is enabled ... its not working in any game i play
post #32 of 38
Same problem for me after updated W10,bf4 get really bad performance with 1 card, the crossfire doesn't work !
post #33 of 38
Well, I've noticed mine disables randomly. Sometimes I restart and it's disabled. Then I'll restart another time and it's fine.

Now, I'm checking whether it's enabled/disabled whenever I restart or boot my system.

- Win 10 Pro (Clean install)
- 15.8 drivers
- CCC shows crossfire option
post #34 of 38
Mine disabled the other day folloeing a crash, took some work to get it back.
post #35 of 38
I can understand why it would disable itself after a crash for system stability reasons.

Anyways, it does it after the login screen. I briefly see the desktop, then the screen goes black and the desktop comes back. Sure enough crossfire was disabled when I checked. It must be doing it when CCC starts...
post #36 of 38
I fixed my crossfire issues ( w/radeon 5970) in windows 10 by going into the registry and changing EnableULPS from 1 to 0. This turns off the power saving feature AMD has in their gpus, and since it has issues with W10 you have to manually turn it off to get the system normal again.
    
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CPUMotherboardGraphicsGraphics
FX 8370 Asus Sabertooth 990FX R3 Sapphire Nitro R9 390 OC w/backplate R9 390X Devil 
RAMHard DriveCoolingOS
OCZ Platinum  WD Velociraptor Deepcool Genome built in AIO Window 10 64 bit 
MonitorMonitorMonitorKeyboard
HP LP2465 HP LP2465 HP LP2465 Redragon K552 Red 
PowerCaseMouseMouse Pad
OCZ EliteXstream 1000watt Deepcool Genome II Redragon Mouse GamerStorm Mousepad 
AudioAudioAudioAudio
Razer Carcharias Onkyo TX-SR605 Bose Monitor KLM Center speaker 
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post #37 of 38
I believe windows 10 is disabling the gpu in device manager when it detects an issue with the gpu. For instance i use toastyx's restart exe when modifying monitors with CRU. Sometimes it hangs on running the restart exe which is supposed to restart amd gpus in windows. I think windows 10 detects the restart as an instability and the disables the gpu. When i reboot my primary gpu is disabled in device manager. I have to manually re-enable it and reboot. Then all is well.

I have not had crossfire dissapear in my case, but i suspect its the same type of issue. Perhaps make sure system is not overclocked both cpu and gpu stock and see if issue reoccurs.
post #38 of 38
So I had this same issue that everyone is describing. Using 2x r9 290s... And after a while I decided to stick with 15.1.1 because it was the only version that let me force crossfire. But recently within the past week, I got a freesync monitor, and my aystem is crashing whenever I have crossfire enabled. Tried multiple drivers -- all using ddu-- and no luck. Reformarted the PC. Tried all the drivers again, no luck, every single time, Reliabiltt History showed the ati driver crashed the system to reboot. So I was thinking, maybe I need to send my new monitor back, LG 4k with freesync, but I unpowereed one of the GPUs and has been running just smooth. So there's definitely a problem with crossfire+windows10+freesync. Which sucks cause I'm playing games at 1080p frown.gif
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