GPU-Z is one of our favorite tell-all utilities to carry around on a USB stick. It doesn't require any installation, it has a small footprint (around 900KB), and it reveals just about everything you could want to know about your videocard, from the BIOS version to the number of ROPs. TechPowerUp is pretty good about keeping GPU-Z updated, and the latest build adds support for AMD's Radeon HD 7970 and 7350 graphics, as well as a few other enhancements.