http://www.videohelp.com/software/DXVA-Checker
DXVA Checker is an application that will provide you with various information about your Decoder Device and Processor Device that can be used with GPU. Requires .NET 3.5 and Visual C++ Runtime. Full description.
This is a free-ware app developed by a guy in Japan with few English skills, so documentation is scarce. It's basically a small tool for video enthusiasts to check Direct X Video Acceleration with their graphics hardware. DXVA is the basic level hardware assist commonly used for stuff like encoding & decoding [playing] video, & came into prominence really with DVDs.
At any rate at less than 1MB I thought it might be something a few might be interested in checking out.