Add 4 usb 30 ports to your desktop computer through a pci express expansion slotr r superspeed usb 30 connectivity at up to 5 gbps and 80 more power than usb 20r dual profile design to fit into full or low profilesmall form factor sff systemsr uses a sata power connector for compatibility with newer systems that have limited or no lp4 power supply connections to ensure maximum power for usb devicesr r the pexusb3s4 4 port pci express superspeed usb 30 card with sata power adds 3 exter