HighPoint Rocket 640L Lite Version 4-Port PCI-Express 2.0 x4 SATA 6Gb/s RAID Controller Bus Type: PCIe 2.0 x4 Interface: SATA 6GB/s Data transfer rate: 600 Mbps PCI-Express 2.0 x4 (Compatible with PCI-Express 1.0) 4 x SATA 6Gb/s Ports Supports up to 4 internal SATA HDD's / SSD's Supports 3TB and larger hard drives Support RAID 0, 1 Supports Windows and Linux operating systems Low profile