assures that the mother board fits in the case.
Holes in case align with ports coming off the motherboard.
The holes holes in the motherboard align with the holes in the case for anchoring the board to the case.
It is important that your case and motherboard share a compatible form factor, so that the motherboard will fit into the case properly. It is also important so that the input and output connections are accessible from the rear of the case.
Because it will not fit !!!!
Because it will not fit !!!!!
It's important if you want them to work together.
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.
Case: minitowers:compact cases,low-profile cases or slimline cases. Power supply: ATX power supply
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.
In theory it can be used but it will be expensive for you since you need to find the right case. Not every case can hold a laptop motherboard for you because of the form factor.
ATX
That would be the motherboard. The processor is plugged into the motherboard, and the motherboard is mounted in the case.
The layout, or form factor, determines what sort of case the motherboard needs and provides a maximum expansion slot limit
power supply
the ATX Form Factor
9.6 x 9.6
The shape and layout of a motherboard (as well as the case) is called the form factor of the motherboard/case. Different form factors include AT (old & out of date), ATX (most common), BTX(up and coming), as well as uncommon form factors like NLX.
Form factor allowed for larger DIMM modules..and there a re designed to use ATX power supplies.