GPU-Z v0.4.6
Grab it if you want to use the latest and greatest - http://www.techpowerup.com/downloads/1864/mirrors.php
GPU-Z is a lightweight utility designed to give you all information about your video card and GPU.
Changes in GPU-Z 0.4.6
Added MSI hardware giveaway
Fixed temperature readings getting stuck on ADT7473 sensor (GTX 400 cards)
Fixed broken BIOS reading on all cards
General improvements to Intel support, still far from perfect
Added support for ATI FirePro V8750
Added support for GeForce GTS 455, GTS 450, GT 440, GT 430, GT 420, GT 330, GT218 based ION, GTX 470M, GTX 460M, GT 445M, GT 435M, GT 425M, GT 420M, GT 415M, GeForce 310M
Added basic detection for AMD Radeon HD 6000 Series
Improved handling for unknown NVIDIA cards
Added fan RPM monitoring for NVIDIA cards