Port : 4Ports USB3.0(+ 2PCS USB 2.0 Optional). Plug into the motherboard through a 19PIN socket, lead to 4 front USB3.0 ports and 2 port USB2.0 ports, and install in the idle optical drive position. With two USB3.0 20Pin interface motherboards or one riser card, with free 5.25" optical drive bit chassis.
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