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Gigabyte GA-P31-DS3L user manual question - 20pin+4pin impossible?

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Hi, can you help me to decipher this lines from user manual of Gigabyte GA-P31-DS3L?

"The main power connector is compatible with power supplies with 2x10 power
connectors. When using a 2x12 power supply, remove the protective cover from the
main power connector on the motherboard. Do not insert the power supply cable into pins
under the protective cover when using a 2x10 power supply."

What does that exactly mean? That it is impossible to use 20pin+4pin cables? Or is it just instruction to place 20pin cable on correct side of 24pin connector?

More about : gigabyte p31 ds3l user manual question 20pin 4pin impossible

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Power supply Expert
Motherboard Expert

It means the board has a 24-pin input with 4 pins blocked off. If you use a 20-pin PSU, plug it into the 20 pins that are not blocked. In the event that you remove the cover that blocks those 4 pins, be sure you do not plug the 20-pin on the wrong side.

You will be fine using a 20+4 pin PSU.

The question has already been sufficiently answered, but I am currently running the same motherboard using a 20pin connector.Even when using a 20pin connector both plugs are designed to only fit together the correct way round.You cannot connect then incorrectly unless you use a lot of force.
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