I/O CREST 2 Port SATA III and 2 Port eSATA III PCI-e 2.0 x2 Non RAID Hard Drive Controller Card Marvell 9235 Chipset Chipset: Marvell 88SE9235 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 6.0Gbps and backwards compatible with SATA I/II at 1.5/3.0Gbps Supports Native Command Queue (NCQ) 2 Internal SATA 6Gb/s Ports & 2 eSATA 6Gb/s Ports Compatible with SATA 6G, 3G and 1.5G Hard Drives PCI-Express x2 Interface is Compatible with PCI-Express x4, x8, and x16 slots