20 Pin Motherboard to 4 USB 3.0 Ports Front Panel Bracket For 5.25" CD DVD ROM Plug & play, no external power needed. Plug in USB 3.0 connector on PC motherboard. Backwards-compatible with USB 1.1 and USB 2.0. It extends the USB 3.0 from mainboard to a ide CD-ROM space. Easy solution for extending 4 USB ports on Front of computer.