[Updated] GPU Caps Viewer...Ver.1.1.72..Sept 26/12
GPU Caps Viewer is a free and highly-featured tool that quickly describes the essential capabilities of your graphics card/GPU including GPU type, amount of VRAM , OpenGL API support level, OpenGL API extensions database and general system configuration, as well as a GPU-Stress-Test functionality (GPU-Burner). Furthermore, this software will allow you to view extensive reports in text or XML format.
GPU Caps Viewer 1.17.2 is a maintenance release. This version fixes some annoying errors in the XML report (like duplicate
attributes or unexpected xml elements). I checked the XML file with the latest Firefox 15.0.1 to be sure its valid.