Checking compatibility is your PC build's seatbelt. Skip it, and you can end up with parts that are all individually great but simply won't work together.
- The CPU socket must match the motherboard socket.
- The motherboard chipset must support the CPU generation. Check whether a BIOS update might be needed.
- Choose a RAM type — DDR4 or DDR5 — that matches your motherboard.
- Check RAM capacity/speed against the motherboard's QVL or spec sheet.
- The case must support your motherboard's form factor.
- The GPU's length and thickness must fit inside the case.
- The PSU needs enough wattage and the right GPU power connectors.
- The CPU cooler must support your CPU socket and fit the case's height/radiator mounts.
- The M.2 SSD must match the motherboard's M.2 slot/PCIe generation. A SATA drive needs a SATA port and cable.
- Check that the monitor's HDMI/DisplayPort matches your GPU's output.
- Check operating system support, driver availability, and Wi‑Fi/Bluetooth support.
Practical Tip: Before you buy, write out your full parts list in one place and check socket, RAM type, case clearance, and PSU connectors line by line. A tool like PCPartPicker can help, but still double-check local market model variations yourself.
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Run the compatibility checklist "before you buy," not after you've already started the build. Find out something doesn't fit after you've bought it, and it stops being a tutorial and turns into a return/refund saga.