How to Build a PC From Scratch: The Complete Guide
Building your own PC is more approachable than it looks — this guide connects every decision to the detailed information you need, step by step.
Building your own PC is more approachable than it looks — this guide connects every decision to the detailed information you need, step by step.
Phase 1: choosing components
- Processor — based on your use (how many cores you need).
- Motherboard — compatible with that processor (what to check).
- RAM — the correct type for your board (DDR4 or DDR5).
- Storage — SSD at minimum for the system (NVMe or SATA).
- Graphics card — if your use requires it (CPU vs GPU by use case).
- Power supply — with the correct wattage (calculator explained).
- Case — compatible with everything above (what to check).
Before buying anything, confirm that everything is compatible with everything else — the step that avoids the most headaches.
Phase 2: physical assembly
- Install the processor on the motherboard (outside the case, first) — align the corner marker, never force it.
- Install RAM in the correct slots per the manual (usually alternating for Dual Channel, not consecutive).
- Apply thermal paste and install the cooler.
- Install the motherboard inside the case, on the metal standoffs.
- Install the power supply.
- Connect storage (SSD/HDD).
- Install the graphics card if you have one, in the main PCIe slot.
- Connect all cables: 24-pin motherboard, 4/8-pin CPU, graphics card cables if needed, case front panel cables (power, USB, audio).
Check the most common mistakes before the first power-on — the extra CPU power cable and the graphics card connector are the most frequently forgotten.
Phase 3: first power-on and verification
- Power on without closing the case yet — confirm it boots and reaches the BIOS.
- Install the operating system from a bootable USB.
- Check temperatures under load after installation.
- Only now, organise the cables and close the case for good.
Final tip: take your time — there's no real rush on a first build, and most problems come from rushed steps, not a lack of technical knowledge.
Frequently asked questions
Do I need advanced technical knowledge to build a PC?
No, it's more approachable than it looks if you follow the steps in order — patience and care matter more than deep prior technical knowledge.
Why test the PC before closing the case?
It lets you easily spot and fix any problem (a forgotten cable, a badly seated component) without having to reopen the case after already closing it and organising the cables.