How to Build a Gaming PC: Beginner's Step-by-Step Guide

What you'll need (~$1,000–1,500 for a strong 1440p build)

• CPU: the brain. Ryzen 7 9800X3D for pure gaming, Core Ultra 7/i5 for mixed use.
• GPU: the muscle — biggest budget item. RTX 5070 vs RX 9070 XT is the 2026 sweet-spot duel.
• Motherboard: must match the CPU socket (AM5 for Ryzen 9000, LGA1851 for Core Ultra).
• RAM: 32 GB DDR5 — see why.
• Storage: 1–2 TB NVMe SSD (the 990 Pro is the safe pick).
• PSU: 750–850W Gold from a reputable brand.
• Case + cooler: any mid-tower with mesh front; a good air cooler beats cheap liquid.

The build, step by step (90 minutes, first time)

• 1. Motherboard outside the case. Install CPU (lift the lever, align the triangle, drop, close), RAM (slots 2 and 4 for dual channel — check the manual), and M.2 SSD (remove the heatsink, insert, screw down).
• 2. CPU cooler. Thermal paste: a pea-size dot in the center. Press the cooler down evenly and screw in an X pattern, alternating sides.
• 3. Into the case. Screw in the motherboard standoffs first (they're pre-installed in most modern cases), then the board. Don't overtighten.
• 4. PSU. Fan faces down (toward the bottom vent) if your case has one. Route cables loosely for now.
• 5. The two cables everyone forgets: the 8-pin CPU power (top-left of the motherboard) and the front-panel connectors (power/reset pins — the manual diagram is tiny but crucial).
• 6. GPU last. Remove two PCIe slot covers, click it into the top slot, connect the 12V-2×6/8-pin power.
• 7. First boot. One stick of RAM if it won't POST, check the motherboard debug LEDs (they literally tell you what's wrong). Nothing on screen? You plugged the monitor into the GPU, not the motherboard, right? Everyone does this once.
• 8. Install Windows from a USB stick. Then drivers: chipset first, then GPU.

Budget check

Prices move weekly — compare current prices before buying; the glossary decodes any spec that confused you.