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 support for NVIDIA GT 440, GTX 550, GTX 560, GTX 570, GTX 590
* Added support for AMD HD 6990
* Added detection support for more Sandy Bridge IGPs
* Fixed ROP count on ATI Madison
* Improved OpenCL detection for ATI
* Added CHL8228 voltage controller support for Cayman Pro and XT
* Improved driver based voltage monitoring support for ATI cards
* Added startup parameter /card followed by the adapter index, starts with 1.
* Several crash and stability fixes