GPU Caps Viewer Portable is a feature-rich tool that quickly specifies the essential capabilities of your video card/GPU. Installer is also available.

GPU Caps Viewer Portable is a feature-rich tool that quickly specifies the essential capabilities of your video card/GPU. Installer is also available.

The specification includes GPU type, the amount of VRAM, OpenGL API support level, OpenGL API extensions database, general system configuration, and 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 Portable Features:

quick view of the graphics configuration (graphics card / GPU type, amount of video memory, drivers version)
display the main OpenGL capabilities (OpenGL version, texture size, number of texture units, etc.)
display the OpenGL extensions supported by your graphics card or display all existing OpenGL extensions no matter what graphics card you have. You can open its description web page for each extension, available at the OpenGL Extension Registry or NVIDIA's OpenGL Extensions spec. Very handy for graphics developers!
display of the system configuration: CPU type and speed, the amount of system memory, operating system
GPU Burner: allows to make the GPU temperature climb to test the graphics card stability. You can open as many 3D views as you want to make your graphics card working to the maximum. For NVIDIA cards, the GPU temperature is also displayed.
list of links related to your graphics card: graphics drivers and graphics card reviews. These links are regularly updated.
full report in text and XML format. This report is useful for developers who need an outline of the customer graphics system (for support purposes, for example).

Similar:
How to Check What Graphic Card (GPU) Is in Your Computer
How to Identify the Hardware in Your Computer
How to Fix Problems Installing Drivers from NVIDIA, Intel, or AMD

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