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This 50cm motherboard expansion cable connects the internal 19/20Pin USB3.0 header and expands it to dual USB-C female ports on the PCI-E back panel. It provides stable 5Gbps transmission speed for external USB-C drives, smartphones and digital peripherals. The integrated rear panel bracket fits standard chassis expansion slots for firm and tidy mounting. Moderate 50cm length keeps internal wiring organized without clutter. No driver required, plug and play, perfect for desktop interface upgrading, port expansion and daily USB-C device connection.