A Beginner's Guide to Building a Budget Gaming PC
Building a PC is mostly a matter of buying parts that fit each other. What each component does, and where a first-time budget goes furthest.
The hard part of building a PC isn’t the building. It’s the two weeks beforehand, working out which parts are compatible and which specifications matter. The physical assembly is closer to flat pack furniture than electronics work, and every connector only fits one way round.
So what follows is the decision-making, roughly in the order you should make it.
Decide the target first
Before pricing anything, answer two questions: what resolution and what frame rate? Everything else follows from that.
1080p at 60fps is a modest target and achievable on a genuinely tight budget. 1440p at high frame rates roughly doubles what you need to spend on the graphics card. Deciding this first stops you buying a card that outruns your monitor, or a monitor your card can’t feed.
Where the money goes
For a gaming-first build, a reasonable split is 35 to 45% of the total on the graphics card, 15 to 20% on the CPU, another 15 to 20% on memory and storage, 10% on the motherboard, and the remaining 15% on the power supply and case.
The graphics card dominates for a reason. It’s the component doing the work in nearly every game, and it’s the one that determines whether you hit your target.
Component by component
Graphics card
Buy the most capable card the budget allows, with one hard constraint: don’t go below 8GB of VRAM, and prefer 12GB or 16GB if the option exists at a similar performance level. Running out of video memory produces stuttering that no other upgrade fixes.
CPU
Mid-range is correct here. A six or eight core current-generation chip won’t bottleneck a budget graphics card, and money moved from the CPU to the GPU produces better frame rates in almost every case. The exception is if you play simulation-heavy games, strategy titles or competitive shooters at very high frame rates, where the CPU matters considerably more.
Check that your chosen CPU includes a cooler. Many don’t, and it’s an easy €30 to forget.
Motherboard
The most over-bought component in budget builds. You need the right socket for your CPU, enough RAM slots, an M.2 slot for your SSD, and the ports you actually use. Premium boards buy overclocking headroom and connectivity most people never touch.
Do check the manufacturer’s CPU support list before buying, particularly if you’re pairing a newer chip with an older chipset, since some combinations need a BIOS update to work at all.
Memory
16GB in two sticks as an absolute minimum, 32GB if the budget stretches. Two sticks rather than one, always, because single-channel memory costs real performance. Enable the XMP or EXPO profile in the BIOS after building, or your expensive RAM will run at base speed.
Storage
One NVMe SSD, 1TB if you can. Games are enormous now and a 500GB drive fills faster than you expect. A basic Gen 3 or Gen 4 drive is fine. Load time differences between mid-range and premium NVMe drives are small enough that the money is better spent elsewhere.
Power supply
The component not to economise on, because a bad one can take other parts with it when it fails. Buy from an established manufacturer, aim for 80 Plus Bronze or better, and check the recommended wattage for your graphics card, then add headroom. A good PSU also outlives several builds, so the cost amortises.
Case
Airflow over appearance. A case with mesh at the front and space for a few fans will keep temperatures down more effectively than any amount of expensive cooling behind a solid glass panel. Check that it fits your graphics card length and CPU cooler height before ordering.
Two things that save first-timers a lot of pain
Use PCPartPicker. It checks compatibility automatically, flags power supply shortfalls, and tracks prices across retailers. It catches the mistakes that are otherwise only discovered when a part physically won’t fit.
And build outside the case first. Motherboard on the box it came in, CPU, cooler, one stick of RAM, graphics card, power supply connected. Boot it. If it posts, you know your core components work before you spend an hour routing cables. If it doesn’t, you have a much smaller problem to diagnose.
On prebuilt systems
Worth honestly considering, particularly at the moment. When component prices are unstable, large system integrators buying in volume sometimes assemble a machine for close to the parts cost. The traditional catch is that savings get made on the power supply, the case and the storage, so check those specifically rather than looking only at the CPU and GPU in the listing.