I have two of them installed and I'm having issues with Crossfire. It seems to be more stable in LN2 mode, but I can't get Crossfire to enable with that turned on. Crossfire does work with the stock BIOS, but now I can't get it to go back to the stock BIOS no matter where the switch is at. Does anyone have any clue on how to either get it back to the stock BIOS or enable Crossfire in LN2 mode, or possibly both? This thing is driving me crazy.
What happens when you try to enable CF on the LN2 BIOS?
It doesn't seem to register the second card being there. It still lights up and draws power, but there is no crossfire option in the CCC.
remove your drivers, and reinstall newest beta.
- Uninstall drivers, run guru3d's DDU, then remove devices (the gpus) in device manager.
- Put both gpus in standard bios position.
- Install 1 gpu - install drivers
- Install 2nd gpu - enable crossfire.
Just out of interest what psu you running these with?
I did try reinstalling the drivers once, but I guess it couldn't hurt to try it again. As for the power supply, I have an EVGA Supernova 1300W.
Sorry it took me so long to get back to this. Work got crazy for the last few months and I didn't really have time to mess with this machine. I'm thinking that my issue (as well as the freezing I had early on) was due to one of the cards being defective. I'm going to try the non-functioning one in my main rig when I get a chance to see if that is the issue. The system seems to be much more stable on the single card right now. Thanks again for all of your help, guys.
Did you originally use MSI Afterburner to disable UPLS? This seems to address crossfire stability problems for many. ULPS is a powersaving feature that seems to cause problems with a second card installed. Once you get your second card sorted out makesure you test with that set (you will need to reboot once disabling it).
I'm not really sure how to do that to be honest. I did take both cards out and try them individually, thinking that it may be an issue with the pci-e slot, and I got no video from the second one at all despite it still drawing power.
Well you nailed it on the head then champ - the gpu is dead. Test in another machine to be 100% sure but yeah..