... Specification v2.0 and backward compatible with PCI-Express 1.x 2.Compliant with Serial ATA 3.0 Pictures ... Interface (for Selected Models) is Compatible with PCI-Express x4, x8, and x16 slotsSupports Communication ... Speeds of 6.0 Gbps, 3.0 Gbps, and 1 ... Protection) or Capacity-Cost (Optimized) SATA III 4-port PCI-e Version 2, x2 Slot Controller Card, HyperDuo, Software RAID, ...