3 replies to this topic

[Raptorman]

I know this has been covered many times, but I couldn't find a definitive answer. Using Radeon R9 390X in Crossfire DX11 mode in MWO Fullscreen, and trying to run MWO at 4k. Using the Crysis 3 profile Crossfire works, but I get micro-stuttering. Using borderlands or bioshock the second card is idle. If I use AFR I get texture flickering, but 90fps. AFR Friendly profile seems to work, but at degraded performance (40fps). Was just looking for ideas, and I'll try to elaborate more after I get home from work. V-Sync On in CCC, off in MWO.

Core i7 975 @ 4.0GHz
EVGA X58 SLI
2x Radeon 390X
12GB Corsair DDR3
Windows 10 64-bit
Catalyst 15.7.1

Edited by Raptorman, 29 August 2015 - 10:28 AM.

[Raptorman]

Okay guys, some success here. Running at 4k resolution, all settings Very High, except Shadows set to low. Using Forest Colony as my test since it seems to be the most intensive. I have gotten Crossifre to work using the Crysis 2 profile. No microstuttering and FPS in the 120's, dipping to 80's in the water where it seems to be most graphically intensive. Here is a screenshot of my CCC Settings.reenshot of my CCC settings.

Edited by Raptorman, 29 August 2015 - 12:10 PM.

[Ultimar]

Can't wait to try this. Crossfire has been broken for me for a long time. Its a challenge driving 3x1080p 40 in. screens.

Was MWO running DX11?

Any special settings in your user.cfg?

[Raptorman]

Sorry it took me so long to reply. I've been off the computer a few weeks. Yes, MWO was running DX11, and I had no special settings in user.cfg. However, you can add the line r_MultiGPU = 1 if you're still not getting proper scaling. Make sure you are using Fullscreen and not Fullscreen Windowed. As Crossfire does not work in Fullscreen Windowed.

This also works for Catalyst 15.8 Beta.

Edited by Raptorman, 22 September 2015 - 06:09 AM.