Is building a PC difficult?

No. Every part fits in one place and one orientation only, so damaging something by mistake is genuinely hard. A first build usually takes two to four hours. The fiddliest part tends to be the front panel cables, because the pins are small and poorly labelled.

Does a self-built PC cost less than a prebuilt one?

Usually yes, but the gap is smaller than commonly assumed — typically 10 to 20 per cent. The real benefit lies elsewhere: you choose every part, so no manufacturer economises on the power supply or cooler, which prebuilt specifications frequently leave unlisted.

Both vendors make good processors today, and raw performance rarely settles it. The practical criterion is the platform: AMD has committed to supporting AM5 through 2027, which gives a real path to swapping only the CPU later. Intel leads in multi-threaded work and idle power draw. For gaming specifically, AMD parts with 3D V-Cache hold a clear advantage.

Air or liquid cooling?

For most builds a good air cooler is enough, and it is the more sensible choice: no pump to wear out and no liquid to leak. Liquid cooling is worth considering for CPUs above 200 W, for sustained all-core workloads, or in a case where a large tower does not fit.

How much RAM do I need?

16 GB is the practical minimum for gaming today, and 32 GB is a sensible standard, particularly with a browser and chat application running alongside a game. 64 GB only starts to make sense for video editing, 3D rendering or virtual machines. Always fit two modules rather than one — dual channel gives a real performance gain.

Can I economise on the power supply?

It is the worst place in the whole build to save money. The power supply is the only component whose failure can damage the others. Use the warranty period as your guide — manufacturers offer ten years only on designs they trust — and choose a wattage with roughly 30 per cent headroom over your calculated need.

Can I reuse parts from an old computer?

The case, drives and often the power supply — yes, provided it has enough capacity and is not much more than seven years old. Memory usually not: DDR4 and DDR5 are mutually incompatible, and the choice is fixed by the motherboard. Coolers are sometimes compatible across a vendor sockets, AM4 and AM5 being one example.

Where is budget best concentrated?

In a gaming build the graphics card determines frame rate more than anything else and should usually take 35 to 45 per cent of the budget. The CPU stops mattering above a certain threshold, particularly at higher resolutions. Do not cut the power supply or cooler, though — those are the parts that carry over into several later builds.

PC building, explained properly

Build your PC without guessing

Which socket, which cooler, which power supply — answered with the reasoning behind each choice, so you can decide for yourself rather than take our word for it.

Start with the assembly guide Compare platforms

platforms covered: 5platforms covered
guides: 14guides
reference builds: 6reference builds

Choose your platform

The socket decides your chipset, memory generation and cooler mounting. It is the first real decision in any build.

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AMDCurrent
AM5
AMD's current platform with a long support window
Memory:
DDR5
PCIe:
PCIe 5.0
AMDMature
AM4
A mature, inexpensive platform with a huge parts pool
Memory:
DDR4
PCIe:
PCIe 4.0
IntelCurrent
LGA1851
Intel's current socket for Core Ultra
Memory:
DDR5
PCIe:
PCIe 5.0
IntelMature
LGA1700
A mature platform that offers both DDR4 and DDR5
Memory:
DDR4 / DDR5
PCIe:
PCIe 5.0
IntelRetired
LGA1200
A retired platform — for upgrading an existing system only
Memory:
DDR4
PCIe:
PCIe 4.0

Air or liquid

The honest comparison: what each class of cooler actually handles, what it costs and what it asks of you in return.

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Air
Air cooling — single tower
The best ratio of price to peace of mind
Heat handled:
95–180 W
Noise under load:
24–34 dBA
Air
Air cooling — dual tower
AiO-class performance without a pump
Heat handled:
180–280 W
Noise under load:
26–36 dBA
AiO liquid
AiO liquid cooling — 240 mm
A sealed loop with a predictable installation
Heat handled:
150–250 W
Noise under load:
28–38 dBA
AiO liquid
AiO liquid cooling — 360 mm
For CPUs that genuinely run hot
Heat handled:
220–350 W
Noise under load:
30–40 dBA
Custom loop
Custom loop
Maximum control, maximum commitment
Heat handled:
300–800 W
Noise under load:
20–32 dBA

Reference builds

Complete part lists at four budgets, each with the reasoning for every component and an indicative price.

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AMD
Budget 1080p gaming build
The cheapest sensible way into PC gaming
1080p gaming, studying, office work
AMD
1440p gaming build
The most sensible point on the price-performance curve
1440p gaming, streaming, graphics work
Intel
Intel creator workstation
For rendering, video editing and compiling
Video editing, 3D rendering, compiling code
AMD
Compact Mini-ITX build
Full performance in a console-sized case
1440p gaming, living-room PC, frequent transport
AMD
Living-room PC (HTPC)
Quiet, small, built for the television
4K video, couch gaming, browsing on the television
Intel
Home server and NAS
Backups, media and services, around the clock
Backups, file server, media server, containerised services

Guides

From your first screw to diagnosing a machine that will not start.

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Assembly
Building a PC step by step
A complete walkthrough from unboxing to first boot. Order matters — the sequence here saves a lot of backtracking.
Assembly
First boot and BIOS setup
What to do once the case is closed: the memory profile, boot order, and the settings genuinely worth changing.
Troubleshooting
The computer will not start — diagnostics
An ordered list of causes from most to least common. In most cases the problem is in the first three entries.
Assembly
Cable management
This is not only about looks. Tidy cables improve airflow and make every later change to the build far easier.

A finished desktop computer on a desk beside a monitor — The end result: a machine you assembled and understand.Christian Wiediger / Unsplash

What builders say

Collected from public forums, each with its source and the date it was gathered so you can check the original.

Rated 5 out of 5
„I picked up a B650 two years ago mainly because AMD promised support through 2027. Last month I swapped just the CPU and kept the board and memory. A BIOS update, ten minutes of work, and that was it.”
u/mkowalski_pc · r/buildapc
Rated 4 out of 5
„I moved from a 240 mm AiO to a dual tower and my load temperatures went up by two degrees. In exchange the pump hum is gone and I paid half what the AiO cost.”
ThermalBudget · Tom's Hardware Forum
Rated 5 out of 5
„I was terrified I would fry something. It turned out everything only fits one way and you simply cannot get it wrong. What took me longest were those tiny front panel cables.”
anna.builds · r/buildapc

These are individual opinions collected from public forums, quoted with their source and collection date. They are not verified reviews and are not affiliated with any manufacturer.

Common questions

View all

Is building a PC difficult?
No. Every part fits in one place and one orientation only, so damaging something by mistake is genuinely hard. A first build usually takes two to four hours. The fiddliest part tends to be the front panel cables, because the pins are small and poorly labelled.
Does a self-built PC cost less than a prebuilt one?
Usually yes, but the gap is smaller than commonly assumed — typically 10 to 20 per cent. The real benefit lies elsewhere: you choose every part, so no manufacturer economises on the power supply or cooler, which prebuilt specifications frequently leave unlisted.
AMD or Intel?
Both vendors make good processors today, and raw performance rarely settles it. The practical criterion is the platform: AMD has committed to supporting AM5 through 2027, which gives a real path to swapping only the CPU later. Intel leads in multi-threaded work and idle power draw. For gaming specifically, AMD parts with 3D V-Cache hold a clear advantage.
Air or liquid cooling?
For most builds a good air cooler is enough, and it is the more sensible choice: no pump to wear out and no liquid to leak. Liquid cooling is worth considering for CPUs above 200 W, for sustained all-core workloads, or in a case where a large tower does not fit.
How much RAM do I need?
16 GB is the practical minimum for gaming today, and 32 GB is a sensible standard, particularly with a browser and chat application running alongside a game. 64 GB only starts to make sense for video editing, 3D rendering or virtual machines. Always fit two modules rather than one — dual channel gives a real performance gain.