Building Your First Gaming PC: A Beginner's Checklist

Start with the games, resolution, refresh rate, and quality settings you want to run. The graphics card is often the main performance constraint at higher resolutions, while the CPU can matter more in high-frame-rate or simulation-heavy games. There is no reliable percentage split that works for every build, and benchmark results should come from workloads similar to yours.

Create a complete budget that includes the case, power supply, cooling, storage, operating system if required, monitor, and peripherals. A £1,200 tower budget is not comparable with a £1,200 setup budget that must also buy a display. Reserve money for every required part before upgrading optional appearance features.

Worked example: if the target is 1440p gaming at a variable 60–120 fps, shortlist graphics cards from recent game benchmarks at 1440p, then choose a CPU that can support that range in the same tests. Only after that should you select compatible memory, storage, cooling, case, and power supply. The example is a method, not a promise that a price tier will reach a particular frame rate.

A matching socket is necessary but not sufficient for CPU compatibility. Check the motherboard manufacturer's CPU support list and the minimum BIOS version for the exact processor. Also check cooler socket support, cooler height or radiator clearance, graphics-card length and thickness, motherboard form factor, and the number and type of storage connectors.

DDR4 and DDR5 modules are physically different and not interchangeable. Confirm the motherboard's memory generation, maximum capacity, supported module layout, and qualified-memory list where available. XMP and EXPO are memory overclocking profiles rather than guaranteed stock operation; the achievable speed can depend on the processor, motherboard, BIOS, and number of modules.

For the power supply, use the graphics-card manufacturer's recommended system wattage and connector guidance as the starting point, then check the CPU and other components. Do not estimate from CPU and GPU TDP alone: those ratings are not a complete whole-system power calculation, and transient demand and connector requirements matter. Use the PC build calculator for an initial plan, then confirm against the component manuals.

Read the motherboard, case, cooler, graphics-card, and power-supply manuals before assembly; connector locations and required steps vary. Work with the system unplugged on a stable surface, avoid carpet where practical, and discharge static before handling components. Never open a power supply.

It is usually convenient to install the CPU, M.2 storage, memory, and CPU cooler on the motherboard before placing it in the case. Align the CPU exactly as the socket instructions show and close the retention mechanism as directed; do not touch socket contacts or improvise if alignment is unclear.

Confirm that case standoffs match the motherboard's mounting holes and remove any extra standoff that could contact the board. Some cases and boards have an integrated rear I/O shield; others use a separate one. Route CPU power and fan cables before large components block access, but follow the manuals rather than treating one assembly order as universal.

Before power-on, recheck motherboard and CPU power, graphics-card power, cooler and fan connections, front-panel wiring, memory seating, and the monitor cable. Connect the display to the graphics card when using a discrete GPU unless the processor and motherboard documentation explicitly support the output you intend to use.

The first memory training and boot can take longer than later starts. In firmware setup, confirm the CPU, total memory, storage, and temperatures are detected. Leave memory at default settings for the first stable boot; enable XMP or EXPO later if the platform supports it, understanding that this is an overclocking profile and may require troubleshooting.

Install the operating system, system updates, chipset drivers, and graphics driver from official sources. Then test stability and temperatures before judging game performance. If the system fails to start, use the motherboard's status LEDs or beep codes and its troubleshooting section instead of repeatedly reseating every part at random.