Build your gaming PC: The simple step by step guide

Building a gaming PC is easier than most people think. If you follow a clear order and do a few compatibility checks before you buy parts, you’ll end up with a fast, stable custom PC that’s easier to upgrade later.

This beginner-friendly guide covers the parts you need, what to prioritize for performance, and a simple step-by-step build process. At the end, you’ll find ready-to-go prebuilt gaming PCs from Greencom if you want maximum performance without the stress, plus local service in Norway.

Shop Greencom Gaming PCs

What you need to build a gaming PC (parts list)

• CPU (processor)
• GPU (graphics card)
• Motherboard
• RAM (memory)
• SSD storage (NVMe recommended)
• PSU (power supply)
• Case
• CPU cooler (air or liquid)
• Case fans (for airflow)
• Operating system (Windows/Linux)

Before you buy: 5 quick compatibility checks

1. CPU socket matches the motherboard
2. RAM type (DDR4/DDR5) matches the motherboard
3. GPU length fits the case
4. CPU cooler clearance fits the case (especially for tall air coolers)
5. PSU size fits the case and has the right cables for your GPU

What to prioritize for gaming performance

For most builds, your best performance upgrades come in this order:

1. GPU first (biggest FPS gains, especially at 1440p/4K)
2. CPU (smoothness, 1% lows, high-refresh esports)
3. RAM (capacity + dual-channel)
4. SSD (loading times and overall “snappy” feel)
5. Cooling + PSU (stability, noise, upgrade headroom)

Simple 2025 rules of thumb

• RAM: 16GB minimum, 32GB for comfort and future-proofing
• SSD: 1TB NVMe is a great starting point
• Airflow: a good airflow case often means lower noise
• PSU: quality + headroom matters more than “just watts”

Step by step: How to build your gaming PC

Step 1: Install the CPU

• Place the motherboard on its box (safe, non-conductive surface)
• Open the CPU socket latch
• Align the triangle marker and gently set the CPU in place
• Close and lock the socket

Step 2: Install the RAM

• Use the recommended slots (often A2/B2, check the motherboard manual)
• Press until both sides click into place

Step 3: Install the NVMe SSD

• Locate the M.2 slot
• Insert at a slight angle and screw it down
• Reattach the heatsink if your board includes one

Step 4: Install the CPU cooler

• If paste isn’t pre-applied, add a small pea-sized dot
• Mount the cooler according to its manual
• Plug the fan into CPU_FAN on the motherboard

Step 5: Prepare the case

• Remove both side panels
• Check motherboard standoffs match your board size
• Plan airflow: front/bottom intake, rear/top exhaust

Step 6: Install the motherboard into the case

• Carefully place the motherboard onto the standoffs
• Screw it in (snug, not overly tight)

Step 7: Install the PSU and route cables

• Mount the PSU (often fan facing down if there’s a bottom vent)
• Connect and route: 24-pin motherboard, 8-pin CPU power, GPU power cables

Step 8: Install the GPU

• Use the top PCIe x16 slot
• Screw the GPU bracket into the case
• Connect the required power cables

Step 9: Connect front panel, USB, audio, and fans

• Front panel buttons/LEDs (use the motherboard manual)
• Front USB and audio headers
• Case fans to fan headers or a hub

Step 10: First boot and BIOS setup

• Power on and enter BIOS/UEFI
• Confirm CPU, RAM, and SSD are detected
• Enable XMP/EXPO for RAM
• Check idle temperatures

Step 11: Install Windows and drivers

• Install Windows
• Install GPU drivers
• Run Windows Update

Common first-build mistakes (quick fixes)

• No display: make sure the monitor is plugged into the GPU, not the motherboard
• No boot: confirm the 8-pin CPU power cable is connected
• High temps: re-check cooler mounting and fan direction
• Low performance: enable XMP/EXPO and use dual-channel RAM slots

Want the performance without the build stress?

If you’d rather get a prebuilt gaming PC with clear specs and local support, check Greencom’s selection:

Shop all Greencom Gaming PCs

ArcticStorm iZ539X Gaming PC - RTX 5060 | i7 | 16GB

A strong value pick for 1080p gaming and high refresh, with a balanced setup.

View ArcticStorm iZ539X

Phoenix Z569CR Gaming PC - RTX 5060 | Ryzen 7 | 16GB

A balanced all-round PC that’s great for gaming and everyday use.

View Phoenix Z569CR

ZENITH hX97Z2 Gaming PC - RTX 5070 TI | Ryzen 7 9800X3D | DDR5 16GB

A more future-ready option for higher FPS at 1440p, built for smooth performance.

View ZENITH hX97Z2

Summary

• Do quick compatibility checks before buying parts
• Build in order: CPU, RAM, SSD, cooler, motherboard, PSU, GPU, cables
• Enable XMP/EXPO and check temps on first boot
• For maximum value and support: consider a prebuilt gaming PC

Shop Greencom Gaming PCs