12 Port PCIe X1 SATA Adapter Card: PCI-Express X1 extends 12 x SATA III 6Gbps ports, so PC can access 12 x SATA drivers at the same time. You can setup a storage pool with 12 x SATA disks, or configure Software RAID in windows/Mac OS/Linux. (Noted: Can not support Hardware RAID) Based on 2 x JMB575+1 x ASM1064 chip, Upstream PCI-Express 3.0 X1 Speed: 12 x SATA III 6Gbps ports share PCI-Express 3.0 X1 bandwidth (8Gbps), so all 12 x SATA III drivers can not reach 6Gbps at the same time. Advantages and Disadvantages: This SATA adapter can connect with 12 x SATA disks, but only PCI-Express 3.0 X1 Speed at max. It is an economical and practical mass storage solution. 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 Accessories: 12 x SATA III cable; 3 x 1:5 SATA Splitter Power Cable