HooToo&laquo; HT-PC002 SuperSpeed USB 3.0 2-Port PCI-E Add-on Expansion Card with Internal USB 3.0 19-pin Motherboard Male Hea Add 2 USB 3.0 ports to your PC - reach up to 5.0Gbps transfer speed according connected devices; DC big 4pin molex connector supplies power to each USB 3.0 ports up to 900Mah max, insure all your huge current consumption USB devices work properly Internal 19 Pin header allows extending external USB 3.0 devices Backwards compatible with USB 2.0 and 1.1 devices PCI-E port: Can support PCI-E X1/X16 slot;