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Dirt Rally - Crossfire AFR shader flicker


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Hello,

I'm making this thread to compile all my findings regarding crossfire issues thus far. To begin with, specs etc according to the form.

System Spec
Motherboard: Gigabyte Z77 DS3H rev1.1
CPU: i5 3570 @ 3.8GHz
RAM: 8GB Kingston DDR3 @ 1600mhz
GPU: Sapphire HD 7850 2GB OC + Gigabyte HD 7850 2GB OC
HDD (on which the game is installed): 1TB WD Caviar black
PSU: Thermaltake Toughpower 700W

Steps to reproduce
I am currently on the 15.4 beta drivers with the Dirt crossfire profile. I know that the notes say that the profile does not work right on certain configurations, and I must report neither does it work on mine.
This bug always keeps showing up as soon as I change the crossfire mode setting in the catalyst control center from default to AFR friendly. There is a definite performance boost, but the flicker persists on all stages with water shaders etc (Monte Carlo, Wales). Attached here is the video demonstrating the issue, along with OSD info from MSI afterburner showing component usage.

https://youtu.be/zE6DMgAi7M4

The issue is currently present on almost all stages in Monte Carlo and Wales and is further compounded by wet weather conditions in Wales.

The settings used at the time of recording the video were on Ultra minus the Multisampling option set to MSAA x2
Furthermore, the driver-provided crossfire profile refuses to work regardless of ingame options settings or Catalyst settings, limiting the GPU usage to 25% and 50% on GPU 1 and 2 respectively, and limiting the framerate to 30 fps. AFR friendly provides double the framerate, and about 20 to 25 more when compared to a single GPU. So the performance is there, but so is the flickering.

As a side note, the steam browser via the steam interface also flickers like crazy when AFR friendly is selected and the game is running in the background.
Hope I've provided enough info, and I hope this is resolved soon(ish) as this is otherwise a brilliant title so far.
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  • 3 weeks later...
Today I downloaded Dirt Rally, launched  Steam & all I have accomplished are benchmarks.
3930K 4.7GHz/ 16GB 213Mhz DDR3/ 2x 290x @ 1050Mhz/ 13000Mhz
14.502.1014-150331a1-182335E
Is Crossfire charging up the GPUs, nope. Spotted a graphical setting that kicks the frames into the floor yet crossfire works at frequency. Yes, that setting, do not enable it.

edit  "*"

Tested a single 290x & DR ran great. 

<benchmark directx11_feature_level="11.0" instruction_set="SSE2" author="ohm" date="03:23:26 on 30/05/2015" machine="R4BE">
<totals races="1" total_time="00:03:08" total_race_time="00:03:08" race_time="00:03:08" />
<fps_race min_fps="91.791588" max_fps="100.014282" av_fps="99.845406" min_fps_ms="10.894244" max_fps_ms="9.998572" av_fps_ms="10.015483" />
<fps_total min_fps="91.791588" max_fps="100.014282" av_fps="99.845406" min_fps_ms="10.894244" max_fps_ms="9.998572" av_fps_ms="10.015483" />
<track index="1" numInRotation="1" totalProfiled="1">
<results samples="18792" min_fps="91.791588" max_fps="100.014282" av_fps="99.845406" min_fps_ms="10.894244" max_fps_ms="9.998572" av_fps_ms="10.015483" 

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  • 1 month later...
Same here,

Radeon HD 7950 Crossfire,

Ultra Settings + VSR 2560x1440


With AFR Friendly profile -> minimum 70 fps but wet ground and windshield droplets are flickering

With default profile -> average 40 fps, wet ground and windshield droplets are fine


I think we need a better tweaked default profile for crossfire.
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