A technician is installing a replacement power supply in an older desktop PC that has a 20-pin ATX main power connector. The new power supply includes a single 20+4-pin (24-pin) ATX connector. Which of the following is the BEST way to connect the new power supply to the motherboard?
Cut off the extra four wires on the power-supply connector so it fits the 20-pin socket.
Use force to insert the entire 24-pin connector into the 20-pin socket so that all pins make contact.
Replace the motherboard, because a 24-pin connector cannot be used with a 20-pin socket.
Detach the additional 4-pin segment and plug only the 20-pin portion into the motherboard, leaving the 4-pin segment unplugged.
Most modern power supplies provide a 20+4-pin main connector. The technician should separate the detachable 4-pin segment and plug only the 20-pin portion into the motherboard's 20-pin socket, leaving the extra 4-pin segment unused. This preserves proper keying and ensures the board receives the expected voltages. Forcing the entire 24-pin connector, cutting wires, or replacing the motherboard are unnecessary and could damage components or create instability.
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What is the purpose of the 20+4-pin ATX connector?
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Why is it important to match the power connector properly to the motherboard?
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What key differences exist between a 20-pin and 24-pin ATX main power connector?
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CompTIA A+ 220-1101 (V14)
Hardware
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