I have a amd radeon 7990 HD. When I play Far Cry 4, the second Gpu is not being used at all, leading to low framerates. I have ULPS disabled, and in all of my other games the second GPU is utilized, but I cannot figure out how/why this game is not using my second card. Any help would be appreciated!
CPU: Intel I7 3930K
GPU: Radeon Hd 7990
Ram: 32 GB Corsair
Mobo: Asus Rampage IV Extreme
That's because there is no Far Cry 4 crossfire profile yet. Even on the latest beta AMD drivers 14.11.2.
You can try to make a custom profile which will work, but you'll get horrendous lighting and shadow problems.
All you can do is wait for a crossfire optimized driver for this game. Keep checking here for the latest beta http://support.amd.com/en-us/downloa...Windows+7+-+64
Or hope Ubisoft bring in there own fix for this (don't hold your breath for that).