SIIG Serial ATA PCI (SC-SAT212-S4) Supports two Serial ATA hard disk drives with high-speed data transfer rates up to 1.5Gb/s (150MB/s) The thin, flexible Serial ATA cable is easier to install and provides better air circulation Breaks the 137GB barrier! Supports various brands of large capacity Serial ATA hard disk drives Configure as boot or secondary controller with flash memory for future BIOS upgrades Lower pin count and voltage requirement, plus better cabling over traditional Parallel ATA make Serial ATA the controller of the future Co-exists with Ultra ATA controller