Define the purpose and required specifications
Choose a motherboard compatible with the CPU
Choose a CPU compatible with the motherboard
Choose RAM compatible with the motherboard
Choose a storage drive
Choose a power supply with sufficient wattage
Choose a case that fits the motherboard form factor
Choose a graphics card if needed
Choose a CPU cooler if not included or if upgraded cooling is needed
Choose case fans if additional airflow is needed
Gather tools and anti-static protection
Install the CPU on the motherboard
Install the RAM on the motherboard
Install the storage drive
Install the CPU cooler
Install the motherboard into the case
Install the power supply into the case
Connect motherboard power cables
Connect CPU power cables
Connect storage power and data cables
Install the graphics card
Connect case front-panel cables
Connect case fans
Perform cable management
Connect monitor, keyboard, and mouse
Power on the system
Enter BIOS or UEFI and verify hardware detection
Set boot order
Install the operating system
Install drivers and updates
Test system stability and temperatures