Another month, another Catalyst driver release from AMD. Like previous versions, these new 9.4 Catalysts are available from the AMD Game website in Windows Vista and XP flavors for both 32-bit and 64-bit systems. The Windows 7 beta is supported, too.
So, what's new? AMD says it has added a new ATI OverDrive application, which is designed for Radeon HD 4000 cards and can "estimate the over-clocked engine and memory values for . . . supported ATI Radeon™ Graphics accelerators." The Catalyst Control Center has included a similar feature for some time, but based on our experience with the Catalyst 9.4 betas, it seems like AMD has made some improvements.
The company has done some bug hunting, too. The release notes mention fixes related to Age of Conan, Google Sketchup, World of Warcraft, World of Warcraft: Wrath of the Lich King, VC-1 playback, and HDMI output. AMD also notes that the Compute Abstraction Layer driver "now functions properly under Windows XP"—that's probably important for GPGPU apps.
You can view a detailed list of resolved bugs, known issues, and changes in the official release notes available here in PDF format.