I/O CREST SI-PEX40076 2 Port eSATA III PCI-e 2.0 x1 RAID Card Ports: 2x eSATA III Chipset: Marvell 9170 Bus interface: PCI-Express x1 Compliant with Serial ATA Specification 3.0 Compliant with PCIe 2.0 specifications Supports Communication Speeds of 6.0Gbps, 3.0Gbps, and 1.5Gbps Supports Programmable Transmitter Signal Level Supports RAID Level 0/1 Supports AHCI 1.0 and IDE Programming Interface Supports Native Command Queuing (NCQ) Hot Plug and Hot Swap Supports Partial and Slumber Power management States Supports Port Multiplier FIS Based Switching or Command Based Switching