Feature: 1. 6Gbps Speed: The PCI E to SATA3.0 expansion card has a maximum transfer speed of 6Gbps, allowing users to add 4X non Raid SATA3.0 storage or AHCI boot HDD,SSD on desktops, servers and internet attached storage (NAS). 2. 4 Interfaces: SATA controller expansion card has 4 interfaces, which can connect 4 mass storage devices at the same time. 3. Multiple Functions: The expansion card complies with the Serial ATA (SATA) Revision 3.0 specification and automatically switches to SATA3.0 with a maximum speed of 6Gbps. Backward compatible with SATA1.0 and SATA2.0. 4. Wide compatibility: 4 Port SATA3.0 expansion card compatible with for Windows Xp,for 2003,for 2008,for 7,for 8,for 10 (32/64 Bit) ,for OS X,for Vista,for Linux and other operating systems. 5. Strong Practicability: Hard disk expansion card supports PCIE 1.0, 2.0, 3.0, 4.0 protocols on PCIE X1, X2, X4, X8, X16 slots. Compatible with SATA 6G, 3G and 1.5G hard drives. Specification: Item Type: PCI E to SATA3.0 Ports Expansion Card Product Material: PCB Chip:For Marvell 9215 Main Control Chip Bus Interface: PCI E X1 (Compatible with X4 X8 X16 Graphics Card Interface) Expansion Interface:4 x SATA3.0(Double Layer) Data Transfer Speed: 6gbps (MAX) Use Chassis: 2U Baffle is Distributed, Suitable for Large and Small Chassis Support System:For Windows Xp,for 2003,for 2008,for 7,for 8,for 10 (32/64 Bit) ,for OS X,for Vista,for Linux and Other Operating Systems. Package List: 1 x PCI E to SATA3.0 Ports Expansion Card1 x Metal Baffle1 x Screw Note: 1. Speed is related to many factors: computer configuration, slot bandwidth, hard disk itself, platform environment, and speed measurement software will all affect the speed. All expansion cards do not guarantee how much speed you can achieve in actual use.2.For Dell,for HP,for Lenovo,for Intel and other brand machines are relatively exclusive to third party expansion cards, and do not guarantee compatibility.3. This product can be used to connect 4 3T, 4T, 6T, 8T hard disks; support 7 x 24 hours of uninterrupted operation.4. This card supports SSD, but it will reduce the transfer rate.