8-Port USB DVI KVM Switch with Audio. The CS1768 8-port USB DVI KVM Switch is a control unit that allows access and control of up to 8 computers from a single USB keyboard, USB mouse, and dual-monitor (DVI-I and VGA) console. It can be cascaded to three levels – allowing up to 73 CS1768s to control up to 512 computers – all from the original single console. In addition, the CS1768 comes with ATEN’s new Video DynaSync™ technology, which optimizes display resolution.