GPU-Z is an utility designed to give you all information about your video card.
Main Features
* Support NVIDIA and ATI cards
* Displays adapter, GPU and display information
* Displays overclock, default clocks and 3D clocks (if available)
* Validation of results
* No installation required
* Support for Windows 2000 / XP / Vista (both 32 and 64 bit versions are supported)
* BETA SOFTWARE - please test and post feedback in the forums
* .. and yes, the author of CPU-Z has granted us permission to use a name similar to his product. Thanks Franck.
http://www.techpowerup.com/gpuz/