This question already has an answer here:
I'm thinking about making a small custom-build server. It would only use around 60W maximum. I don't want to pay too much so I think using an old power supply would work.
The motherboard I'm thinking about to buy has a 4-pin CPU power connector and 24-pin ATX power connector. The old power supply has multiple power outputs for the motherboard including a 20-pin ATX power connector and a 4-pin connector that was also used in the old computer to power the CPU.
Can I just plug the 20-pin power connector in the 24-pin connector of the motherboard and connect the CPU power supply? I don't know if I need to plug the 4-pin into the extra 4 pins of the 24-pin connector, leave it unplugged or use the 4-pin connector on the MB for it.
I also assume a 250W power supply won't damage anything and will power it even if it's only using 10W? Or does it need a minimum output?
I've already searched but I couldn't find a specific question about using the extra 4-pin connector.