If you want to research this yourself, the two modes are "Inband Frame Readback" (NVIFR) for desktop capture (has overhead), and "Frame Buffer Capture" (NVFBC) for exclusive fullscreen capture (no overhead.) With that option disabled, shadowplay will use frame buffer capture which does not (in theory) add input lag, since the game doesn't need to wait for Shadowplay to capture the frame. Shadowplay will inject itself into the game's code in that mode and this will add overhead. If that option is enabled, the game doesn't run detached from the capture anymore. RealNC wrote:Whether Shadowplay adds input lag depends on whether you have the option enabled that makes it capable of capturing the desktop.
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