6 Port PCIe X4 SATA Adapter Card: PCI-Express X1 extends 6 x SATA III 6Gbps ports, so PC can access 6 x SATA drivers at the same time. You can setup a storage pool with 6 x SATA disks, or configure Software RAID in windows/Mac OS/Linux. (Noted: Can not support Hardware RAID) Based on ASM1166 chip, Upstream PCI-Express 3.0 X2 Speed: 6 x SATA III 6Gbps ports share PCI-Express 3.0 X2 bandwidth (16Gbps), so all 6 x SATA III drivers can not reach 6Gbps at the same time. OS Compatibility: Plug-and-play in Windows/Mac OS/Linux/NAS (Note: Not support Windows XP) For Windows 7, please reinstall the driver according to the manual, download link: https://drive.google.com/drive/folders/16G_sGjexuniyPuJmluL2YRWH-z-NZOli?usp=sharing Installation Requirement: PCI-Express X4/X8/X16 slot. Accessories: 6 x SATA III cable; 1 x 1:5 SATA Splitter Power Cable; 12cm Regular Profile Bracket and 8cm Low Profile Bracket