High Point RocketRAID 640 4 SATA Port PCI-Express 2.0 x4 SATA 6Gb/s RAID Controller 6Gb/s (600MB/s) data transfer rate Major OS support includes Windows, Linux, Free BSD PCI-Express 2.0 x4 4 SATA ports RAID level 0, 1, 5, 10 and JBOD Low Profile