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This 4Pin Molex to 3Pin fan converter cable is designed to power your PC chassis cooling fans via traditional Molex IDE D-plug power ports. No complex installation required, just plug and play to supply steady power for 3Pin computer fans. Made with high-quality oxygen-free copper wires and durable insulation, it ensures safe current transmission and long service life. The compact structure saves internal space and helps optimize cable management inside the computer case. It is an ideal replacement and auxiliary wiring accessory for PC building, fan expansion and hardware DIY modification.