Vantec 4 Channel 6-Port SATA 6Gb/S PCIe RAID Host Card (UGT-ST644R)- Drive Capacity: 8TB Hard Drive, Interface: PCIe v2.0, require x4 or better PCIe slot, Connectivity: 4 Channel, Configurable as 4 Internal SATA III, 6Gb/s Ports or a combination of Internal and External (eSATA) Ports (All Backward Compatible with SATA II/I)​, Dimension: 111 x 68 x 18mm