This is a repost of mine from another thread, but I figured it relevant to add it to her for people searching for this topic.
You will get good scaling using the Crysis 2 profile for Crossfire. However, Shadows will kill your performance. If you're running a Crossfire Setup I'll give you the settings I'm using.
In your user.cfg file add the line "r_MultiGPU = 1"
Using MSI Afterburner, or Sapphire TRIXX disable ULPS.
Now, go to your Crossfire Preferences. Enable Crossfire, and check the box to allow Crossfire in games that do not have an associated profile.
Then, go to your MWO Profile in Radeon Settings. Settings are as follows:
Anti-Aliasing Mode = Use Application Settings
Anti-Aliasing Method = Multisampling
Morphological Filtering = On
Antisotropic Filtering Mode: Override Application Settings
Antisotropic Filtering Level: 16x
Texture Filtering Level: Quality
Surface Format Optimization: On
Wait for VSync = "Your Preference"
OpenGL Triple Buffering: On
Shader Cache: AMD Optimized
Tesselation Mode: AMD Optimized
AMD Crossfire Mode: Use AMD Pre-Defined Profile
AMD Crossfire Profile:
Crysis2.exe
Frame Pacing: On
Frame Target Control: Disabled
Now for in game settings.
Resolution your choice, all other options your choice. The key to making this work with minimal stuttering and no fps drops are to turn
Shadows to LOW.
If you do not turn shadows to low Crossfire will cause serious fps drops in maps such as Forest Colony when you're near water.
My personal settings for Crossfire are all settings on Ultra except
Shadows on LOW, Anti-Aliasing FXAA, and I am running at 4k resolution and averaging 75 fps.
Using Radeon Crimson 15.12 I have also had success with no texture flashing using AFR Friendly and AFR Compatible Profiles.
My system is as follows:
Windows 10 64-bit
Intel Core i7 975EE @ 3.8GHz
EVGA X58 SLI Motherboard
12GB DDR3 RAM
Radeon R9 390X Crossifre setup
Hope this helps all struggling with Crossfire setups. Remember - SHADOWS ON LOW.
Edited by Raptorman, 06 January 2016 - 04:28 PM.