All about the various PC power supply cables and connectors
2008-7-15u2002·u2002The image above shows the 20 pin power cable plugged into a 24 pin motherboard. A 20 pin power cable only fits into one end of a 24 pin motherboard connector so you can't insert it incorrectly. The 24 pin motherboard connector is actually just the 20 pin connector with 4 extra pins added on the end. The original 20 pins were unchanged.
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