Amazon.com: BGNing 1 to 4 PCI Express 16X Slots Riser Card PCI-E 1X to External 4 PCI-E Slot Adapter PCIe Multiplier Card USB 3.0 Mining Special Riser Card for Bitcoin Miner : Electronics
Amazon.co.jp: Inateck Superspeed 4 Ports PCI-E to USB 3.0 Expansion Card - Interface USB 3.0 4-Port Express Card Desktop with 15 pin SATA Power Connector, [ Include with A 4pin to 2x15pin
Amazon.com: Syba SD-PEX20159 PCI Express Card x1 with USB 3.0 Type A 4 Ports Super Speed and 15-Pin Power Connector Renesas Chipset : Electronics
Amazon.com: StarTech.com 2 Port PCI SuperSpeed USB 3.0 Adapter Card with SATA Power - Dual Port PCI USB 3 Controller Card (PCIUSB3S22) : Everything Else