SIIG JU-P20412-S2 PCI Express to 2-Port USB 3.0 SuperSpeed Card Type: PCI Express to USB Card External USB Ports: 2 x Type-A USB 3.0 Standard: USB 3.0 Data Transfer Rate: Up to 5Gb/s Operating Systems Supported: Windows 7 (32-/64-bit) / Vista (32-/64-bit) / XP (32-/64-bit) Specifications: Compliant with Universal Serial Bus 3.0 Specification, Revision 1.0 Compliant with PCI Express Base Specification, Revision 2.0 NEC Chipset RoHS-compliant Parts: 1 year limited Labor: 1 year limited