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If it as a 20 or 24 pin connector and a 4 pin connector then it is a ATX power supply.
4 Pin Aux connectors are used by some video cards to provide additional power to them via the power supply.
The purpose of a 4-pin auxiliary connector on a motherboard is to provide an additional 12V power supply to the processor.
The atx 12 connector is one of the motherboard power connectors and used for 12 volt power connect for cpu voltage regulator.
The most common power supply connectors for motherboards will be either a 20 or 24 pin connector. Older unit used less pins like the ATX but the cure standard is the 20 or 24 pin main connector.
8-pin power supply connector with 150 watts
They are not but good motherboards have different color connectors also they are preshaped in the certain way. It is done to avoid incorrect connections. Each connector can go only in its place.
8-pin power supply connector, 150watts
If you are refering to the 20 or 24 pin molex connector, this is the motherboard power distribution subsystem from the power supply. If you are refering to the several other small connectors, they have various functions. Front panel indicators and switchs, USB distribution connectors, fans, CD audio, etc.
Most common is a 4 PIN connector that comes conntected to the power supply or jumped from another 4 PIN connector. The pins will be in a streaght line. There are now also SATA power connectors that once side "flat and long" connects the the CD drive and the other "fat and short" 4 PIN female end to connect to a 4 pin male end
Many different connectors can have 20 pins. Some examples of these are:ATX power supply connectorsJTAG cables (used for programming embedded devices)A proprietary OBDII connector found in some BMW vehiclesHDMI cables / connectors (used for high-definition video)Very old Apple floppy drives
As a general rule, there are several extra power connectors of varying types on the power supply. This allows for expansion with various drives and devices. Some power supplies don't provide the serial ATA (SATA) connector. In which case, you can use an adapter power cord to accommodate SATA hard drives.