Ably USB 3.0 to VGA Multi Monitor External Graphics Card RAM: 512MB memory or higher. Driver should be installed for the adapter to function well. Make sure the devices have USB3.0 port (USB3.0 supports: 1920*1080 (1080p max), USB2.0 only supports: 800*600) Can only use one of these adapters at a time. DOES NOT support 2 or more at the same time. System Requirements:Windows 7/8/Window XP(NOT FOR Vista). CPU: Intel/AMD single Core 1.5GHZ or Higher processor. Resolution up to: -UXGA: 1600*1200; -WSXGA+: 1680*1050 1920*1080.