This high-speed 4-channel PCI-to-Serial ATA host adapter supports up to four Serial ATA hard disk drives with high-speed data transfer rates up to 150MB/sec. Its thin, flexible Serial ATA cable is easier to route inside a PC. This adapter breaks the 137GB barrier and supports various brands of large capacity Serial ATA hard disk drives. Lower pin count and voltage requirement, plus better cabling over traditional Parallel ATA make Serial ATA the controller of the future.