nVidia ShadowPlay

Capturing footage from your favorite games can reduce frame rates quite considerably at native resolutions, in addition to reducing level and texture load speeds if capturing to the hard drive holding the game. Furthermore, some apps record using uncompressed formats, filling your drive with gigabytes of data. If you own a GeForce GTX 600 or 700 Series GPU, youll soon have a new option for creating high-quality captures, courtesy of an upcoming GeForce Experience module were calling ShadowPlay. Completely free to use, ShadowPlay leverages the H.264 encoder built into Kepler graphics cards to record max quality, native resolution gameplay footage that is compressed and encoded on the fly, before being automatically saved as a YouTube-friendly .mp4. In addition to traditional game capture, ShadowPlay users can activate Shadow mode, which continually records and saves the latest action to a user-definable buffer. If you pull off an outrageous mid-air maneuver in Battlefield 3, simply hit a predefined hotkey and your moment of glory is instantly saved to a .mp4, ready for publication on YouTube. Perfect for the majority of gamers who dont require a capture of every single second of action, ShadowPlays innovative new mode ensures you never again say, I wish you could have seen that! With ShadowPlay enabled, every special moment can be captured and quickly shared, demonstrating your pro-gaming skills to your best friends.

Damn thats actually really awesome! Don't know how often I would use that, but to know that the option exists is great!