WBTUO's new VLI chipset desktop PCI-E 4 port USB 3.0 (external) +1 USB 3.0 (built-in) + USB 3.0 20 PIN (built-in) expansion card: the expansion card can be installed on the desktop board PCI-E slot with external 4 USB 3.0 interface internal 1 USB 3.0 interface 1 internal USB 3.0 20PIN interface. 4 external USB 3.0 interfaces in after the baffle position installed in the chassis back can be used to directly connect the USB 3.0 U disk and removable hard disk and other equipment; 2 USB 3.0 slots situated within the internal chassis the internal USB 3.0 20 PIN slot located inside the chassis which can be used to connect the front panel of the chassis USB 3.0 20 PIN expansion joint expansion USB 3.0 interface.