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This 4-port PCI SATA RAID controller expansion card converts PCI slot to multiple SATA ports, solving the problem of insufficient motherboard SATA interfaces for desktop computers. It is compatible with all mainstream 2.5" and 3.5" HDD and SSD, supporting normal working mode and RAID storage mode to meet daily storage expansion and data security needs. Equipped with 2 SATA data cables for direct installation and use. Built with stable control chip, it ensures high-speed and low-latency data transmission, easy to install and no complicated driver setting required, ideal for DIY assembly, office computer storage upgrade and multi-harddisk expansion.