When you assemble a pc you need to know how all The parts match with each other if you are able to know how to pair each part with other like a high end CPU with a third class motherboard just ask the consumer to give you parts that will match with each other and make a heaven
1.grab a motherboard
2.find a processor
- Find ram
4.get a cooler
5.buy a gpu if you want to game hard
- Get a hdd
7.get a PSU