Chipset: Silicon Image SIL3512 Interface: 2 x ESATA & 2 x SATA port. PCI 32-Bit Interface Compliant with PCI Specification Revision 2.2 Supports two independent Serial ATA channels Independent 256-byte FIFOs per Serial ATA Channel for host reads and writes Supports RAID functions 0 or 1 Supports co-exist RAID set and Non-RAID HDD Allow HDDs with different sizes to be configured in a RAID set Supports MS Windows 98SE/Me/2000/XP