the regular ATX has a 20 pin power connector, while the enhanced ATX power connector has 24 pin power connector.
A regular ATX motherboard uses a single 20-pin P1 connector with optional 4-pin auxillary power connector
24
ATX version 2.2 allowed for 24-pin P1 connector, which is backward compatible with the 20-pin P1 connector.
Power input connector, or just power connector
Power input connector, or just power connector
ATX Ver 1.0 has one 20 pin port ATX Ver 1.1 has one 20 pin port and a 4 pin port ATX Ver 2.0 has one 24 pin port and a 4 pin port
The atx 12 connector is one of the motherboard power connectors and used for 12 volt power connect for cpu voltage regulator.
Many/most motherboards have a separate power connector for the CPU. Check your motherboard's installation instructions to locate the CPU power connector. Then connect the matching power supply cable to the CPU power connector on the motherboard.
There are no differences between the power connector of an AT motherboard versus that of a BabyAT motherboard.
24 pin connector is required to supply power to the motherboard.
20 pin P1 connector.
24 pins