SMAKN&reg; Port Serial ATA SATA to RAID PCI Card Adapter SIL3114 With 2 SATA Cables This is a PCI expansion/adapter card with 4 SATA ports allowing for more devices to be hooked up in your computer, an ideal hardware for upgrading your computer. Stable and reliant Silicon Chipset SIL3114 PCI specification revision 2.3 compliant w/ 32-bit 33/66Mhz host interface Serial ATA specification revision 1.0 compliant Data transfer rate up to 150MB/s. (1.5Gbps)