techPowerUp - (Freeware)
GPU-Z is a software that provides the user important information about the graphics card.
GPU-Z is a small but powerful application that offers essential information for all of the graphics card version GPU, BIOS, frequency, etc.
The simple and easy to use interface displays a window with information such as the ID, shaders, the type of memory bandwidth, the version of the driver or the frequency of the GPU.
GPU-Z application works with nVidia or ATI card types.
* Added explanation about PCI-Express power savings and 3D render test to accurately measure bus config under load
* Added function to display ASIC quality for Fermi and Southern Islands. (Located in the GPU-Z system menu; click the icon in the top left of the window)
* Fixed crash on older ATI cards
* Added voltage monitoring for HD 7970
* Improved real-time clock monitoring for HD 7970
* Fixed OpenCL detection for AMD Antilles, Whistler, Seymour, Blackcomb
* Improved default clock reading for AMD HD 7970 and Fusion
* Added support for AMD FirePro V7900, HD 6930, HD 7690M, HD 6410D
* Fixed Intel Sandy Bridge IGP to be DirectX 10.1, 32 nm
* Added support for NVIDIA Tesla C2075, GeForce GT 630M