... 3.0PCI-Express x2 Interface (for Selected Models) is Compatible with PCI-Express x4, x8, and x16 slotsSupports Communication Speeds of ... )Supports Port Multiplier FIS Based Switching or Command Based SwitchingCompatible with SATA 6G, 3G and 1.5G Hard DrivesRAID Function:Note ... ) SATA III 4-port PCI-e Version 2, x2 Slot Controller Card, HyperDuo, Software RAID, with Full and Low Profile Brackets