Form factor allowed for larger DIMM modules..and there a re designed to use ATX power supplies.
Case: minitowers:compact cases,low-profile cases or slimline cases. Power supply: ATX power supply
The case, motherboard, and power supply must all be the same form factor. Obviously the motherboard and the case would have to be the same or the motherboard would never fit in the case. Then the power supply must not only fit in the case, but have the same connectors as the motherboard. Otherwise it won't work.
power supply
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.
Case, Power Supply and Motherboard The case must support the form factor of the motherboard, and the motherboard must support the CPU socket type for any given CPU.
yes, the power supply provides power specifically to the motherboard in turn dispersing power to all components plugged into the motherboard, hope this helped :)
The three components that must have the same form factor in a computer are the case, power supply and motherboard. The case should be able to support the form factor of the motherboard and the motherboard should be able to support the CPU socket type.
Power supplies are not part of the motherboard; they are located in the computer case.
motherboard
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.
Hard drives, floppy drives, case fans, motherboard
Case / power supply, Motherboard, CPU, Memory, Optical drive, Hard drive...