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This SF04 adapter card adopts professional SFF-8643 Mini-SAS HD to PCIe 4.0 X16 conversion design, providing 4 high-speed SFF-8643 ports for connecting Mini-SAS HD storage devices. It supports PCIe 4.0 transmission standard and is downward compatible with older PCIe versions to match most mainstream motherboards on the market. The card does not support PCIe bifurcation function, focusing on stable and reliable basic storage expansion performance. It is equipped with both regular full-height bracket and low-profile bracket, easy to install in standard desktop chassis, 2U server chassis and compact ITX cases. Perfectly suitable for DIY desktop storage expansion, NAS storage assembly, small server data storage and other usage scenarios, plug and play, simple installation without complicated settings.