AMD has released a new Catalyst beta driver for Windows

Feature Highlights of The AMD Catalyst 14.3 Beta V1.0 Driver for Windows

Thief:
AMD Mantle and AMD True Audio support
Improves stuttering observed in CrossFire mode
Call of Duty: Ghosts: QUAD CrossFire profile update – improves level load times
Audio issues observed when using CrossFire configurations (and V-sync enabled) have been resolved
BattleField 4: V-sync issues observed on CrossFire configurations (with Mantle enabled) have been resolved

Known Issues

Intermittent driver stability issues when installing/un-installing on Desktop Kaveri platforms that support AMD Enduro technology under Windows 8.1. Please disable Enduro support to resolve the issue
Secondary GPUs do not enter low power state on CrossFire configurations; this issue will be addressed in the next AMD Catalyst beta release
Thief (DirectX): Lighting flickers on CrossFire configurations only after CrossFire has been enabled then disabled; this issue will be addressed in the next AMD Catalyst beta release
Battlefield 4 (DirectX): Quad CrossFire configurations with Eyefinity Display configurations suffer slowdowns and stability issues
Titanfall: Flickering occurs under AMD CrossFire configurations

  AMD Catalyst 14.3 Beta V1.0 Driver for Windows