Be careful with this. The intensity shuttle only supports a very specific chip set.
From
http://www.blackmagicdesign.com/product ... techspecs/:
Requires an x58 based motherboard with onboard USB 3.0, or a USB 3.0 PCI Express card and an x58 or P55 series motherboard.
I use a Dazzle DVC100 for Standard Definition streaming on Twitch.tv. If you want to get a Dazzle, you
must get the
White DVC100. Many of the other versions (and colours) will not work for modern operating systems, or will, in general, just fail you in some other manner. The Dazzle supports RCA and S-Video, which means that even modern consoles work on it. However it does not support widescreen playback even though some modern consoles are capable of broadcasting a widescreen signal over RCA. Around here (Ohio), you can get a Dazzle off the shelf for $50 (USD). If you get one on ebay or similar you may be able to find one for as low as $20 (USD). The Dazzle seems to be the standard SD capture card for Twitch.tv broadcasters.
One thing to note: To my knowledge,
no capture cards in existence support lagless video display. All the capture cards I have ever used, or seen used, have some delay between the video displayed on the computer and the video displayed on a TV that is directly attached. These capture cards have been optimized for video recording and playback. They are not for picture-in-picture gaming. For some games this will not be noticeable, but for games requiring reflex reactions to visual cues, like Street Fighter, it can really harm the experience.