ATX power connector questions

[imtai]

Some mainboards still have 20 pin ATX power connectors, while some
boards have 24 pin power connectors. Why is this?
Does it provide a performance boost? Like more power to to motherboard to use? More heat?

 

[omnisome]

The 20pin power connectors are found on old motherboards and Intel Atom, just a change of standard. Almost all power supplies have a 20+4 connector however which allows you to use both 20pin and 24pin boards.

 

[CompTIA_Rep]

The extra four pins provide one 3.3 V, 5 V and 12 V circuit for additional power. Nothing else is gained.

 

[popatim]

The gain is that the current draw on those lines is now spread out and reduces the risk of melting the connector. Its why some graphic cards have 2 pcie connectors instead of 1, One would just get too hot with all the current passing thru it.