AMD has released Catalyst 14.7 RC3 drivers for Windows

Feature Highlights of the AMD Catalyst™ 14.7​ RC3 Driver for Windows

Includes all improvements found in the AMD Catalyst™ 14.7 RC driver
Display interface enhancements to improve 4k monitor performance and reduce flickering.
Improvements apply to the following products:
​AMD Radeon R9 290 Series
AMD Radeon R9 270 Series
AMD Radeon HD 7800 Series​
​​Even with these improvements, cable quality and other system variables can affect 4k performance. AMD recommends using DisplayPort 1.2 HBR2 certified cables with a length of 2m (~6 ft) or less when driving 4K monitors.​
Wildstar: AMD Crossfire profile support
Lichdom: Single GPU and Multi-GPU performance enhancements
Watch Dogs: Smoother gameplay on single GPU and Multi-GPU configurations​

Feature Highlights of the AMD Catalyst™ 14.7​ RC Driver for Windows

Includes all improvements found in the AMD Catalyst™ 14.6 RC driver
AMD ​CrossFire™ and AMD Radeon™ Dual Graphics profile update for Plants vs. Zombies​​​
Assassin's Creed IV - improved CrossFire scaling (3840x2160 High Settings) up to 93%
Collaboration with AOC has identified non-standard display timings as the root cause of 60Hz SST flickering exhibited by the AOC U2868PQU panel on certain AMD Radeon™ graphics cards. A software workaround has been implemented in AMD Catalyst 14.7 RC driver to resolve the display timing issues with this display.
Users are further encouraged to obtain newer display firmware from AOC that will resolve flickering at its origin.
Users are additionally advised to utilize DisplayPort-certified cables to ensure the integrity of the DisplayPort data connection.​​​

Feature Highlights of the AMD Catalyst™ 14.6 RC Driver for Windows

Plants vs. Zombies (Direct3D performance improvements):
AMD Radeon R9 290X - 1920x1080 Ultra – improves up to 11%
AMD Radeon R9 290X - 2560x1600 Ultra – improves up to 15%
AMD Radeon R9 290X CrossFire configuration (3840x2160 Ultra) - 92% scaling
3DMark Sky Diver improvements:
AMD A4-6300 – improves up to 4%
Enables AMD Dual Graphics/AMD CrossFire support
Grid Auto Sport:
AMD CrossFire profile
Wildstar:
Power Xpress profile
Performance improvements to improve smoothness of application
Performance improves up to 24% at 2560x1600 on the AMD Radeon R9 and R7 Series of products for both single GPU and multi-GPU configurations.
Watch Dogs:
AMD CrossFire – Frame pacing improvements
Battlefield Hardline Beta:
AMD CrossFire profile

Known Issues

Running Watch Dogs with a R9 280X CrossFire configuration may result in the application running in CrossFire software compositing mode
Enabling Temporal SMAA in a CrossFire configuration when playing Watch Dogs will result in flickering
AMD CrossFire™ configurations with AMD Eyefinity enabled will see instability with BattleField 4 or Thief when running Mantle
Catalyst™ Install Manager text is covered by Express/Custom radio button text
Express Uninstall does not remove C:\Program Files\(AMD or ATI) folder

  AMD Catalyst 14.7 RC3 Driver for Windows