Desktop Power supply Connector Why use 4 extra pin in Cable?
Dear Friends, This is a basic question asked by any interviewer why 4 extra pin used in a power supply. So this is the main reason to use them,,,,,, CONNECTING A 20-PIN PSU TO A 24-PIN BOARD. Technically, a 20-pin ATX connector can be plugged straight into a 24-pin motherboard socket, leaving pins 11, 12, 23, and 24 unconnected. The four pins that you are leaving open are just redundant lines for higher current capability to ATX connectors and pinouts). The power connector is polarized, so it's difficult to insert it wrong into the header unless you force it really hard. Nevertheless, double check that pin 1 goes into pin 1. However, power supply compatibility is not merely a mechanical issue. There was obviously a good reason to add extra four wires to the main cable-- it was done to support higher current requirements. If you exceed current rating of a connector, it may overheat and even melt. Since the Molex power connector is rated at 6 amps per circuit, with 20-...
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