Sunshine-tipway Super Speed 3.5 Inch Floppy Disk Bay Front Panel Port for Computer Case [20 Pin and 9 Pin Connector] + PCI-E 2 Port USB 3.0 Express Card with 5V 4-Pin Power Connector Supports 2 downstream ports for all speeds;Connect the 4 pin power connector to provide sufficient power to external devices, such as hard driver. Compatible with: PCI-E 1x / PCI-E 4x / PCI-E 8x / PCI-E16x. Compatible with: USB 3.0 / 2.0 / USB1.1. Support: Windows 8.1 / 8 / 7 / Vista / XP. With 2 usb 3.0 ports,support usb 1.1/2./3.0,the transfer speed up to 480MBs. Support Plug and Play. 20-pin motherboard connector USB3.0 and 10-pin USB 2.0 interface board USB interface can provide + 5v / 2A power supply current to the external device