Download the AMD Catalyst 14.6 RC2 (14.200.1004.0 June 20) driver. This driver works with Windows 7 and 8.1.

We have a discussion thread open on this driver right here.

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 R9290X - 2560x1600 Ultra – improves up to  15%
• AMD Radeon R9290X 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
• 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 Eyefinity enabled will see application stability 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

Build Info:
DriverVer=06/20/2014, 14.200.1004.0000
Catalyst 14.6 RC2
CCC: 2014.0620.2260.39449
D3D: 9.14.10.01044
OGL: 6.14.10.12967
OCL: 10.0.1526.3
Mantle: 9.1.10.0020