Silverstone Add-On Card Model SST-ECU04-E Type: Low profile - PCI-E 2.0 x2 (10Gbps) Internal USB Ports: 2 x 19pin USB 3.1 ports Standard: USB 3.1 Data Transfer Rate: Up to 10Gbps Operating Systems Supported: Windows 7 (32bit/64bit), 8/8.1/10 (32bit/64bit), Ubuntu/Linux/Mac OS Specifications: Power requirement: 5V via SATA 15pin power connector USB 3.1 controller: ASMedia ASM1142 ReDriver ASIC: Pericom PI3EQX1002B Power Management: Support USB 3.1 and USB 2.0 link power management Current protection: Support over current detection and protection Extra: UASP function Dimensions: 0.34 x 3.46 x 5.45 Weight: 0.78 lb.