Asynchronous reprojection is a class of computer graphics technologies aimed at ensuring a virtual reality headset is responsive to user motion even when the GPU isn't able to keep up with the headset's target framerate, and to reduce perceived input lag at all times regardless of internal framerate. Reprojection involves the headset's driver taking one or multiple previously rendered frames and using newer motion information from the headset's sensors to extrapolate the previous frame into a prediction of what a normally rendered frame would look like. "Asynchronous" refers to this process being continuously performed in parallel with rendering, allowing synthesized frames to be displayed without delay in case a regular frame is not rendered in time, and reprojecting all frames by default to reduce perceived latency.