PC compatibility: checks to run before buying
Socket, RAM, case, PSU, and cooling: a practical checklist to avoid expensive compatibility mistakes.
Compatibility is layered
A compatible build is not just a list of powerful parts. Every component adds constraints to the others.
The reliable method is to check dependencies in order: CPU/motherboard/RAM, then case/cooling/GPU, then PSU/connectors.
Common mistakes
Buying a board with the right socket but an old BIOS, picking unsupported RAM, or ignoring cooler height are common errors.
GPU length and power connector requirements are also often missed, especially on recent graphics cards.
If compatibility is uncertain, do not force the build. Replace the risky component before ordering.
Use Selects as a safety net
Add CPU and motherboard first, then RAM, case, and cooling. Compatibility warnings become more accurate as the build fills in.
Connected guides explain the warning instead of asking you to trust it blindly.