eTeknix reviewed the Razer Ripsaw HD Capture Card
A quote from the article:
Tired of dealing with lag and sacrificing your system performance while streaming? Or perhaps you’re gaming on a console, and fed up of the poor quality of the built-in game recording features? Then it looks like Razer are here to answer your call for help. The Ripsaw HD is a welcome upgrade on their old model, kicking up the capture quality to 1080 @ 60 FPS. Furthermore, with 4K pass-through, you can still game on your usual monitor at high-resolution without compromising your stream or gaming experience.Razer Ripsaw HD Capture Card Review
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Because it captures via HDMI, it’ll work with a vast range of gaming devices. PC, obviously, but Xbox One, PlayStation 4, Switch, etc are all good. Remember, it’ll work with PS4 Pro and Xbox One X too, but the capture is 1080 @ 60 FPS even when using the consoles 4K output modes.