Hi Victor!  Thanks for your post! VIDEO CARDS:  The system requires only standard VGA  graphics.  I can't imagine there would be a  problem.  Most of the interface is web-based, accessed from a desktop computer, so we don't have extensive requirements.  CABLEMODEMS: We work  great with cable modems.  Version 3.0 that will be released shortly (it's out on beta now) even has  support for dynamic IP addressing (DHCP) on the  external interface.  Regards, Kim