Screen flicker and shimmering with CrossfireX in games

[DownTheSky]

Maybe somebody here had the same problem.. Got a 2nd card (R9 280X) for Witcher 3 and now games don't behave properly. If I run either of the cards alone, everything is ok. If I enable CFX in Catalyst I get this strange shimmering and the shadows flicker in all 3d apps. Got it to work one time after flashing both cards with same settings bios. The problem was gone until I restarted the PC and now it's back again.

Drivers are latest from AMD site (15.5 betas)

PC specs:
2x R9 280X Gigabyte WF3
MB: Gigabyte 990FXA-UD3
CPU: FX 8320@4.3 Ghz
RAM: 16GB 800Mhz DDR3
PSU: Superflower Golden 750W

 

[Udgnim]

Highlights of AMD Catalyst™ 15.5 Beta Windows Driver
Crossfire Profile Update for:
*The Witcher 3: Wild Hunt
Performance Improvements for the following :
The Witcher 3: Wild Hunt - Up to 10% performance increase on single GPU Radeon R9 and R7 Series graphics products
Project Cars - Up to 17% performance increase on single GPU Radeon R9 and R7 Series graphics products
Recommendations:
For further information on how to optimize your drivers for The Witcher 3 - Wild Hunt and AMD CrossFire™ please read the following article.
Know Issues:
​​*The Witcher 3: Wild Hunt - To enable the best performance and experience in Crossfire, users must disable Anti-Aliasing from the games video-post processing options. Some random flickering may occur when using Crossfire. If the issue is affecting the game experience, as a work around we suggest disabling Crossfire while we continue to work with CD Projekt Red to resolve this issue
The Witcher 3: Wild Hunt - We are aware that some users may be experiencing random crashes during gameplay on AMD Radeon™ R9 285 series products and are working with CD Projekt Red to investigate the issue and determine a fix.
[419945] Project CARS: Corruption may be observed if Anti-Aliasing is set to DS2M when run in Crossfire mode. As a workaround we suggest using a different Anti-Aliasing method.

release notes

 

[DownTheSky]

It's not that. It's in all the games I've tried, and it's very severe. Yes, disabling AA helped a little.

 

[RaulF]

Did you try other drivers?

 

[Silverforce11]

There's a small tweak you can do to help that and also make CF run faster for Witcher 3.

Find the rendering.ini file in your install directory: \bin\config\base

EnableTemporalAA=true

Change it to false.

It's a custom FXAA developed by Proj Red.