Originally Posted by nVidia
First and foremost, GeForce Experience 1.7 introduces ShadowPlay, a free, fast, easy-to-use, gameplay-recording module that allows you to record video of your gaming’s most exciting moments and share it so the whole world can stand in awe of your gaming prowess. By utilizing this hardware encoder, ShadowPlay’s impact on game frame rates is far lower than that of traditional recording applications, which can place great strain on the CPU. With higher frame rates you enjoy smoother gameplay, and by encoding in H.264, ShadowPlay avoids the humongous multi-gigabyte .files associated with other applications. This saves space, but more importantly reduces stutter by avoiding unnecessary hard disk thrashing.
ShadowPlay has two user-configurable modes. The first, the eponymous Shadow mode, constantly records your gameplay, saving up to 20 minutes (10 minutes in Windows 7) of high-quality 1920x1080 footage to a temporary file. If you pull of a particularly impressive move in-game, simply hit the user-defined hotkey and the footage will be saved to the user’s chosen directory. The file can subsequently be edited with the free Windows Movie Maker application , or any other .mp4-compatible video editor, and uploaded to YouTube to share with friends or the World Wide Web. For local playback, we recommend Windows Media Player or MPC-HC.