The SATA2 Serial ATA II PCI-Express RAID Controller Card from Monoprice allows you to add two extra hard drives to your computer through the PCI-Express slot on your motherboard. The card comes with an optional RAID utility which lets you configure a RAID 0 or RAID 1 setup on the SATA ports for increased speed or improved reliability. It uses the SIL3132 chipset. Compliant with PCI-Express 1.0a specification