$6.22 (Free or Cheap Shipping) 24-pin to PCIe 6-pin ATX Motherboard Power Supply Adapter Cable (24-pin/6-pin, 30cm) at m.FastTech.com - FastTech Mobile
24Pin ATX Power Supply Extension Cable 24 Pin 1 to 2 Male to Female Power Port Cable 20+4 Pin Desktop Internal PSU cable - Newegg.com
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GOOBAY 93239: Motherboard cable, 24-pin ATX plug > 24-pin ATX socket, 30 cm at reichelt elektronik