Chipset: Marvell 88SE9215. Installed with a full profile bracket, Low profile included with the package. Port Multiplier FIS-based and Command-based switching supported. Supports SATA Rev 3.0 transfer speeds up to 6.0G bps and backwards compatible with SATA I/II at 1.5 / 3.0G bps. Supports Native Command Queue (NCQ). 4 Internal SATA 6Gb/s Ports. Compatible with SATA 6G, 3G and 1.5G Hard Drives. PCI-Express x1 Interface is Compatible with PCI-Express x2, x4, x8, and x16 slots