The first step is getting the right computer parts. The six essential parts you'll need for a working PC are the case, motherboard, processor, RAM, hard drive, and power supply unit. A computer case is an enclosure for all the other components. This chassis serves as housing for a PC's internal hardware. The motherboard is the core piece that connects the computer's electronic components. Motherboards come in different sizes, and with a wide variety of sockets. Choose one that's compatible with the processor and case that you want.
The processor, or CPU, is critical to the PC's overall performance. Most desktop computers use Intel and AMD chips. When shopping for a processor, consider clock speed, number of cores, cache size, and the amount of RAM. If you're building a home PC, the minimum memory capacity you should consider is 4GB. For a gaming system, go for 8GB of RAM or higher.
The two options for computer storage are hard disk drives (HDDs) and solid-state drives (SSDs). SSDs are faster and quieter. They're also more durable and consume less energy. However, HDDs are more affordable, and available in higher capacities.
The power supply unit, or PSU, converts the computer's power from the outlet into usable power for the other parts inside the case or enclosure. The PSU takes the AC power and converts it into continuous power that the computer requires so it can run smoothly and normally. This converted, usable power is called DC.