I've helped dozens of people build their first gaming rigs. The same 3 mistakes come up almost every single time:

1. Spending 60% of the budget on the GPU and skimping on everything else.

Your RTX 4070 means nothing if it's bottlenecked by a cheap CPU or choking in a case with zero airflow. Balance matters more than any single component.

2. Not checking motherboard compatibility before ordering.

Wrong socket, wrong RAM generation, wrong form factor for the case. I've seen people buy a full parts list off Reddit without realizing half of it doesn't fit together. Always use a compatibility checker — or just ask someone who knows.

3. Ignoring the power supply.

A sketchy 500W PSU from a brand you've never heard of is a fire hazard, not a deal. The PSU is the one component that can literally destroy everything else if it fails. Don't cheap out here.

If you're planning your first build and want to avoid these traps, PC Assembly Pro walks you through the entire process — from picking parts to cable management to first boot. No fluff, no jargon, just builds that work.