The latest GeForce Experience software update includes support for ShadowPlay, a feature that was first showcased back with the GeForce GTX 780 last May as a method to record in-game action to share with others online or to keep in your own personal archive of awesomeness.
With ShadowPlay, gamers can record footage at 1080p quality and further choose from between three different "quality" settings. Clips can be captured either manually or automatically using "shadow mode," an option that constantly records gameplay in the background as you play. Pressing a designated hotkey will automatically store the last several minutes of gameplay into an MP4 file that is YouTube compatible.
The feature relies primarily on Kepler's H.264 encoder which means, unlike some readily available software solutions, it shouldn't have a tremendous hit on in-game performance. Nvidia said the typical performance hit will be around five percent although more demanding instances / games may top 10 percent. They also warned that high-end SLI setups may experience a greater hit due to the extremely high frame rates being pumped out.
Note that there are some recording restrictions based on the operating system you are using. Windows 7 users are capped at a 10-minute long buffer using shadow mode while manual recordings can only be up to 3.8GB total. In Windows 8, Shadow mode has a live buffer of 20 minutes and manual recordings are only limited by the amount of storage of tap.
It's also worth pointing out that ShadowPlay only works with full-screen games and with DirectX 9, 10 and 11 titles only. You'll need a GeForce GTX 650 or newer GPU to get in on the action and unfortunately, notebook GPUs aren't supported at this time.
You can download the latest Nvidia Geforce Experience right here.