The 3ware 9550SX-4LP PCI-X to Serial ATA II RAID controller delivers over 800 MB/sec RAID 5 reads and exceeds 380 MB/sec RAID 5 writes, making it 200% faster than the industry leading 3ware 9500S RAID controller. 7th generation StorSwitch non-blocking switch fabric technology and sophisticated SATA II features including 3 Gbps transfer speed, Native Command Queuing, and Port Multiplier support drive this unmatched performance.