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Replacement for the older P8 and P9 AT style connector, this connector is one of the largest connectors inside your computer that connects the computer power supply to an ATX style motherboard. As shown to the picture to the right, this 20-pin cable is a multi-color cable and may be labeled as P1.
As seen in the pictures, the cable has a small clip on the top of the cable that should snap and hold the cable in place. This cable is also keyed, which means it only connects in one direction.
A power supply with a 24-pin connector can be used on a motherboard with a 20-pin connector by leaving the four additional pins disconnected. However, if you have a 24-pin connection on your motherboard all 24-pins need to be connected. If you are using a power supply that does not have a 24-pin connector, you need to purchase a new power supply.
When using a connector like that shown above note the arrows pointing to each other. For the cable to be correctly inserted, the arrows must point to each other.
Also see: ATX, Motherboard terms, P4, Power terms, Power supply
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