Elgato Game Capture HD can record video sources that use the following resolutions:
240i (Composite or S-Video input, using software version 1.2.1 or higher)
320 by 240 resolution
480i (HDMI, Component, Composite or S-Video input, using software version 1.2.1 or higher)
720 by 480 resolution
480p (HDMI or Component input)
720 by 480 resolution
576i (HDMI, Component, Composite or S-Video input, using software version 1.2.1 or higher)
720 by 576 resolution
576p (HDMI or Component input)
720 by 576 resolution
720p (HDMI or Component input)
1280 by 720 resolution
1080i (HDMI or Component input)
1920 by 1080 resolution
1080p (HDMI or Component input, using software version 1.1 or higher)
1920 by 1080 resolution
Please Note: 480i and 480p are supported, but not at 640 x 480 resolution. 720 x 480 resolution is supported.