Building your own PC can sound intimidating, but it's really not that different from assembling a large Lego set — the parts only fit together in specific ways, so it's hard to get it wrong. This guide is written for someone who has never built a PC before and wants to feel confident on their first attempt.
1. How should you split your budget across parts?
The general rule is that the biggest share of your budget should go to the GPU, since it has the largest impact on gaming performance. A rough split looks like:
- Graphics card (GPU): ~35-40% of budget
- Processor (CPU): ~15-20%
- Motherboard + RAM: ~15-20%
- Storage (SSD): ~8-10%
- Power supply (PSU) + case: ~12-15%
To see which combination makes sense for your budget, try our hardware recommendation tool — enter your budget and get a suggested parts list.
2. Check part compatibility
This is where most build mistakes happen. Things to check:
- CPU socket: The processor (e.g. AM5, LGA1700) must match the motherboard's socket.
- RAM type: Does the motherboard support DDR4 or DDR5? They're physically different and not interchangeable.
- Case form factor: The motherboard (ATX, mATX, ITX) must fit the chosen case.
- PSU wattage: Choose a power supply above the GPU manufacturer's recommended minimum wattage — leaving 100-150W of headroom over the recommendation is generally safe.
- CPU cooler height: Especially in small cases, make sure an air cooler will actually fit.
3. Tools you'll need
You don't need a complex toolkit — a Phillips #2 screwdriver and, ideally, an anti-static wrist strap (to prevent electrostatic discharge) are enough. You can also discharge static by touching a bare metal, unpainted surface.
4. Recommended build order
Most people find it easiest to go in this order:
- Prep the motherboard outside the case: Installing the CPU, RAM, and M.2 SSD is much easier while the motherboard is still on a flat surface (or in its box).
- Install the CPU: Line up the arrow on the socket with the arrow on the processor — never force it.
- Install the RAM: Check the manual for which slots to use for "dual channel" mode (usually slots 2 and 4).
- Mount the CPU cooler.
- Place the motherboard into the case and screw it in.
- Mount the power supply (PSU) in the case.
- Install the GPU into the PCIe slot — push until you hear it click into place.
- Connect storage (SSD/HDD).
- Connect all cables: 24-pin motherboard power, 8-pin CPU power, PCIe power (for the GPU), and front-panel cables (power button, USB, audio).
- Test the first boot — confirm the system powers on before fully closing up the case.
5. Install the operating system
You can install Windows from a USB drive (created with Microsoft's official "Media Creation Tool"). After installation, the first thing to do is download the latest driver from your GPU manufacturer's site (NVIDIA/AMD/Intel) — we explain why this matters in this guide.
6. Test your new build
Once setup is done, use our FPS calculator to see what FPS you should realistically expect in the games you plan to play — comparing your actual performance against this estimate is a fast way to spot if something's wrong.
Common mistakes
- Undersizing the PSU wattage (newer high-power GPUs can have sudden power spikes).
- Installing RAM in the wrong slots (ending up in single-channel mode and losing performance).
- Miswiring front-panel cables (especially the power button pins) — always check the motherboard manual, the pins are tiny and easy to mix up.
- Forgetting to apply thermal paste on the CPU cooler, or applying way too much.
Your first build might take a while, and that's fine — most steps are reversible, and it's genuinely hard to get it badly wrong. If you get stuck, your motherboard and GPU's own manuals are the most reliable source.
Frequently Asked Questions
What's the hardest step for a first-time builder?
For most people, it's wiring the front-panel cables correctly (especially the power button pins) — the pins are tiny and require carefully checking the motherboard manual. The rest of the process is usually more intuitive.
Do I need a special workspace to build a PC?
No, any flat, well-lit table works fine. Avoid working on carpet, and occasionally touch a bare metal, unpainted surface to discharge static electricity — that's enough precaution for most builders.
Can I test the parts before closing up the case?
Yes, and it's actually recommended — assembling the motherboard, CPU, and RAM outside the case and testing the first boot (a "breadboard test") lets you catch problems early, saving you from repeatedly opening and closing the case.