Sans Digital 2ESPCIE2 2-Port eSATA PCI-Express (x1) Host Adapter Selectable RAID and BASE BIOS Jumper RAID 0, 1, 1+0, 5 support using Silicon Image SATARAID utilities, PC and MAC supported PCIe 1x connections. Fully compliant with SATA I and SATA II. Supports Windows 2000, XP, Vista, 2003 Server, MAC OS 10.3.x or later, and Linux.