4-Channel Serial ATA 6Gb/s (SATA 3) AHCI 2-Lane PCI Express (x2) Card (4-Internal) (with both Regular & Low-Profile brackets) Four (4) internal SATA III connectors Supports max of seven (7) connected drives Supports max one (1) SATA FIS-based or Command-based Port Multiplier and max four (4) drives connected to PM (Port Multiplier) Supports Hardware RAID-0 (Stripping), RAID-1 (Mirroring), and HybridDrive modes by GUI or BIOS setting in Windows, but Non-RAID only for drives attached to PM Comes with both regular height & low-profile brackets for maximum compatibility