SIIG's SATA II PCIe host controller is an ideal solution in expanding your SATA storage capacity to your PCIe-equipped desktop computer. It is designed to add two SATA channels for connecting up to two additional SATA hard disk drives. The SATA II PCIe host controller delivers data transfer rates of up to 3.0 Gb/s and supports 48-bit LBA for drives with capacity larger than 137GB. Additional features supported by this Serial ATA PCIe host controller include independent command fetch, scatter/gather, command execution, Native Command Queuing (NCQ), Non-zero offsets NCQ, Out-of-order data delivery NCQ, and hard disk hot-plugging ensure fast and reliable data transfers.