Add up to four high-speed SATA hard disks at speeds of up to 150 MB/s - 50% faster than Ultra ATA 100! SIIG Serial ATA 4-Channel PCI-M breaks the 137 GB barrier! Supports various types of large capacity hard disks. PRODUCT FEATURES: Compliant with Serial ATA 1.0 specifications and PCI specification, rev. 2.3; Coexists with onboard controller and connects up to 4 SATA hard disks; Bootable from any drive connected to this controller; Supports 32-bit wide PCI bus at 66 MHz and data transfer rates up to 150 MB/s (1.5 Gb/s); Features independent 256-byte FIFOs per channel for host reads and writes; Features Watch Dog timer for fault resiliency and flash memory for future BIOS updates; High quality SATA data, power and "Y" split power cables are included.