OpenGL (Open Graphics Library) is a cross-platform, open-standard API (Application Programming Interface) for rendering 2D and 3D graphics. It is widely used in various industries, including gaming, scientific visualization, and professional graphics. OpenGL 4.2 is a beta version of the API, which offers improved performance, new features, and enhanced functionality compared to its predecessors.
The AMD Catalyst Preview driver is a special version of the Catalyst driver that provides early access to new features and technologies. In this case, the Preview driver offers support for OpenGL 4.2 beta, allowing users to take advantage of the latest graphics API on their Windows 7 and Vista systems. which offers improved performance
AMD Catalyst Preview Driver: Unlocking OpenGL 4.2 Beta Support on Windows 7 and Vista** which offers improved performance