Expresscard eSATA ports with SIL3132 chipset. SATA II Expresscard/34mm. Compliant to x1 Lane PCI-Express throughput of transfer rate up to 2.5Gbps. Support SATA II specification with transfer rate up to 3Gbps. Backward compatible to SATA 1.0a specification. eSATA compatible for all external ports. Support hard disk with Native Command Queue (NCQ) feature. Hot plugging supported. Supports Windows 2000, Server 2003 32/64-bit, XP 32/64-bit, Vista 32/64-bit