This PCI SATA Raid Controller Internal Expansion Card provides four ports for connecting RAID cards. It is compatible with PCI and is perfect for those who want to expand their computer's storage capabilities. The card is designed for use with RAID controllers and has external interfaces for easy connection.With this RAID Controller Card, you can connect multiple RAID cards and create a larger storage unit. It has four ports and is perfect for those who want to expand their storage capabilities without having to worry about compatibility issues. The card is easy to install and use, making it a great addition to any computer setup.