The motherboard does not connect the power supply to the peripherals. The power is supplied directly to most peripherals such as HDDs and CD drives by cables from the power supply. Some special expansion cards, such as network cards, get enough power from the motherboard through the PCI slot to function.
it is used to supply power to motherboard and other peripherals
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.
Peripherals relative to a motherboard are: power supply unit, CPU, RAM, HDD/SSD, optical drive, graphic/sound/LAN cards (if not integrated).
power supply
To connect the power cord from the power supply to the PS2 power connection on the motherboard, locate the 4-pin connector on the power supply cable and line it up with the corresponding 4-pin PS2 power connection on the motherboard. Gently press and secure the connector into place until it clicks. Ensure the connection is secure and the power cord is properly routed to avoid any interference with other components.
Case: Your motherboard must be able to fit in your case and must support your motherboard size (correctly placed standoffs). Power Supply: You can't have a shortage of power or else your power supply will get overloaded and "die", or even possibly explode for that matter.
The atx 12 connector is one of the motherboard power connectors and used for 12 volt power connect for cpu voltage regulator.
The fans usually connect to the motherboard, but they can connect directly to the power supply unit.
A 350 watt power supply typically has multiple cables that connect to different components in a computer system. These cables typically include connectors for the motherboard, CPU, SATA drives, PCIe devices (such as graphics cards), and peripherals such as fans and lighting. Each cable leads to the corresponding component that requires power for proper operation.
Will a ATX power supply work with a ASUS motherboard?Read more:Will_a_ATX_power_supply_work_with_a_ASUS_motherboard
You should not bother to check any power supply in the motherboard. You need to take the motherboard to service centre if faulty.
if the motherboard is designed for the case fan you are using its best to plug it into the motherboard, this will free up a spot on the power supply. Otherwise as long as the voltage and amps are the same it doesn't really matter. If you try to plug it into both you will double the power of the fan and very likely fry the fan.