Intel Boosts Integrated HD Graphics Performance with New Drivers
Intel says that versions 220.127.116.1171 (32-bit) and 18.104.22.168.3071 (64-bit) bring a new driver architecture as well as optimzations designed to boost game performance by as much as 10% in some popular titles including Starcraft II, Batman: Arkham City, and WoW: Mists of Pandaria. Intel HD 2500/4000 graphics now have reduced CPU overhead as well as support for OpenCL 1.2.
Up to a 10% performance boost with new drivers
The releases address several needed fixes, including artifacts in certain titles and corruptions or crashes in programs such as CLBenchmark and Cyberlink Power Director 10.
You can download the updates here or here, depending on what your system requires.