An ATX v2.0 power supply typically features a 24-pin main connector for the motherboard. This connector may also be split into a 20-pin and a 4-pin configuration for backward compatibility with older motherboards. In addition to the 24-pin connector, ATX v2.0 power supplies include various other connectors for CPUs, GPUs, and peripherals.
24
the regular ATX has a 20 pin power connector, while the enhanced ATX power connector has 24 pin power connector.
24
ATX version 2.2 allowed for 24-pin P1 connector, which is backward compatible with the 20-pin P1 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
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24 pin
24 pin
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24
I think AT used 20 pins, and ATX introduced 24 pins.
How much is v20 12k worth