After one of CCC updating (I don't remember what version from, one of 13.11 betas) stopped working crossfire. Now I use latest beta CCC 14.1 and can't enable crossfire because crossfire option as you can see below is missing and second adapter is "disabled". Second adapter is actually working because I can use it on calculations like render, mining etc. So looks like this is software problem. How to "enable" my second adapter and how to enable crossfire?
Graphics Card: Sapphire hd7850 2Gb and Sapphire hd7850 1Gb
AMD Catalyst Driver Version, and Driver History: 14.1 beta
Operating System: Win 8.1 64 bit, also tested on Win 7 64 bit
Motherboard or System Make & Model: Gigabyte GA-P67A-D3-B3 rev. 2.0
Power Supply: Corsair 850W
Display Device(s) and Connection(s) Used: AOC d2367Ph, HDMI
CPU Details: i5-2400
Motherboard BIOS Version: UA6 (UEFI BIOS)
System Memory Type & Amount: 2x4Gb Corsair
Additional Hardware: SSD boot drive, WiFi PCI-e card
Best Answer
I have a 5970 and crossfire is disabled in the newest drivers including 14.3 beta. The only option was to use the 13.9 drivers which works properly.
Wish they would fix this in the newest drivers, I submitted a bug report but no response.