I'm planning on recording PC screens in general, including gaming and videos.
I'm aware of screen capture software like FRAPS, Playclaw etc. and have tested them out, but the increased strain on my computer is noticeable while they are active, even with extra background programs closed.
I'd read elsewhere about a lag-free solution that sent the video to a second computer running the screen capture software, offloading the extra effort to the second machine and keeping gameplay smooth.
If I intend to try this solution, what hardware and software am I likely to need in order to duplicate the video output and be able to record it with a second machine? Audio recording won't be a problem, as I intend to do that separately.