GPU Monitor is a free Windows gadget that will let you watch live information in numbers and graphs about your video card, including temperature, fan load, gpu load, Vmem, etc. If you use more than one Graphic Adapters the gadget will let you select which one to monitor.
GPU Monitor will play a sound (optionally) for overheat, will let you customize its appearance and functionality in many ways, decide what to monitor, or hide a module.
Save the .gadget file to install it later, or run it to start using GPU Monitor immediately