Capturing on-screen footage has, in the past relied heavily on specialised software which in turn consumes local system resources, involving hardware such as the CPU, memory and graphics cards. For casual video capture it might be convenient to rely on software but for users who are serious about streaming or on-screen recording, a dedicated capture card is an essential tool to minimize the impact on system resources. For gamers, in particular, a capture card will alleviate any frame-rate drop which can occur while recording and is therefore regarded as an essential item. Link