Sabrent ST-PX2T Serial ATA II 3Gbps 4-Port PCI Express RAID & SATA II Host Controller Card Provides four SATA II connections with SATA II RAID 0 and RAID 1 options SATA II offers speedy 4 Gbps transfer rates Card provides 2 internal and 2 external SATA II connectors RAID 0 (striping) for maximum performance; RAID 1 (mirroring) for extra reliability 48-bit LBA supports drives larger than 137 GB