AMD has launched its newest Catalyst 13.4 WHQL driver that brings support for the launched Radeon HD 7990 flagship dual-GPU graphics card as well as some performance improvements, latency performance, bug fixes and new AMD Enduro profile updates.
The new AMD Catalyst 13.4 WHQL Software Suite contains, AMD Catalyst Display driver v12.104, HydraVision, southbridge/IXP driver and AMD Catalyst Control Center/AMD Vision Engine Control Center. The support has been extended to the Radeon HD 7990 as well as the HD 7790.

As far as the improvements go, the new driver brings Catalyst Driver optimizations to improve performance in Far Cry 3, Crysis 3 and 3DMark as well as significantly improve latency performance in Skyrim, Boderlands 2, Guild Wars 2, Tomb Raider and Hitman Absolution games. The performance gain range from up 13 percent in Quake Wars and up to 5 percent in Batman Arkham City and Civilization V, all noticed on the entire AMD Radeon HD 7000 series.

It also includes a couple of resolved issues and you can check them all below.

Feature Highlights of AMD Catalyst™ 13.4

Support added for AMD Radeon HD7790 and AMD Radeon HD 7990
Catalyst Driver optimizations to improve performance in Far Cry 3, Crysis 3, and 3DMark
Significantly improves latency performance in Skyrim, Boderlands 2, Guild Wars 2, Tomb Raider and Hitman Absolution
Performance gains seen with the entire AMD Radeon HD 7000 Series for the following:
Batman Arkham City (1920x1200): Performance improvements up to 5%
Borderlands 2 (2560x1600): Performance improvements up to 10%
Quake Wars (1920x1200): Performance improvements up to 13%
Hitman Absolution (2560x1600): Performance improvements up to 11%
Wolfenstein MP (1920x1080): Performance improvements up to 11%
Civilization V (2560x1600): Performance improvements up to 5%

Resolved Issues

With the Radeon HD7790 graphics card, corruption may be seen in the game Tomb Raider with TressFX enabled
Texture flickering may be observed in DirectX 9.0c enabled applications
Corruption observed in Tomb Raider with TressFX enabled for AMD Crossfire and single GPU system configurations
Corruption observed on objects and textures in the game, Call of Duty – Black Ops 2
Corruption observed in the game, Alan Wake (DirectX 9 Mode) when attempting to change in-game settings with Stereoscopic 3D using Tridef
Corruption observed on textures in the game, Battle Field: Bad Company 2 with forced anti-aliasing enabled
Adobe Photoshop CS6 experiences screen flicker under Windows 8 based system
Horizontal line corruption may be observed with forced anti-aliasing enabled in the game, Dishonored
System hang may occur when scrolling through the game selection menu in the game, DiRT 3
F1 2012 may crash to desktop on systems supporting AMD PowerXpress (Enduro) Technology

Source: AMD.com.