I've helped dozens of people build their first gaming PC. These are the mistakes I see over and over — and they're all avoidable.

1. Buying a CPU and motherboard that don't match.

Sounds obvious, but Intel 13th gen and 14th gen use the same socket (LGA 1700) while AMD's AM4 and AM5 are completely different. One wrong pick and you're returning parts for a week.

2. Cheaping out on the power supply.

A $30 PSU can fry a $400 GPU. Get at least 80+ Bronze from a reputable brand. This is the one part where "good enough" isn't good enough.

3. Forgetting about the case airflow.

That tempered glass case looks sick until your RTX is thermal throttling at 95°C. Front mesh panels > aesthetics if you want your parts to last.

4. Not checking RAM compatibility.

DDR4 and DDR5 are NOT interchangeable. And even within DDR5, your motherboard's QVL list matters. Check it.

5. Skipping cable management.

Messy cables block airflow, make troubleshooting a nightmare, and look terrible. Spend 20 extra minutes routing cables behind the motherboard tray. Future you will be grateful.

If you want part-by-part guidance for your specific budget and use case, that's exactly what I do inside PCBuilds HQ.