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.
* ATI Radeon HD 5870 (Cypress) fully supported (includes voltage monitoring)
* Added or improved support for NVIDIA FX5500, 9400 GT, G73, GTS 240, GT 140, FX 1800, GT 120 (Apple), FX 380, FX 350, GTX 295 Single PCB, Quadro CX, FX 5800, FX 4800, FX 3800, GTX 180M, GTX 260M, FX 2700M, G 110M, GT 120M, GT 220M, FX 1700M, G 105M, MCP79MX
* Added or improved support for ATI HD 4730, HD 4650 AGP, M92, M96, M98
* Added clock reading for Intel i910, i915, i945, 946
* Added support for DDR3 detection on G9x
* Added monitoring support for RV7xx based mobile chips
* Voltage controller "slaves" are now called "phases"
* Added Intel Havendale detection
* Fixed BIOS parsing on some newer HD 4870 cards
* Added voltage monitoring support for MSI N275GTX Lightning