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This ATX main power extension cord is used to lengthen the original connecting wire between the power supply and the motherboard. The separable 20+4 pin structure flexibly matches various generations of desktop mainboards, completely reserving full power and signal transmission. Reinforced strain relief at the connector root effectively avoids wire fracture caused by repeated bending and pulling. It perfectly solves the problem of insufficient original cable length during DIY PC assembly, water cooling refitting and hardware upgrade, being a commonly used essential wiring accessory for desktop computer installation and maintenance.