PC Part Compatibility Guide: Avoid These Common Mistakes
Nearly every “why won’t my PC boot” support thread traces back to one thing: incompatible parts. The good news is that compatibility issues are almost entirely preventable if you check five things before you buy anything.
1. CPU and Motherboard Socket
Your CPU must physically and electrically match your motherboard’s socket. An AMD Ryzen CPU needs an AM4 or AM5 motherboard depending on generation; Intel CPUs need the matching LGA socket for that generation. Even within the same brand, sockets change across generations — always check the specific chipset generation, not just “AMD” or “Intel.”
2. RAM Generation and Motherboard Support
DDR4 and DDR5 RAM are not interchangeable, and a motherboard only supports one. Beyond that, check the motherboard’s QVL (Qualified Vendor List) if you’re buying high-speed RAM kits — some boards only officially support certain speeds without manual tuning.
3. GPU Length vs Case Clearance
Modern GPUs, especially high-end ones, can be 300mm+ long. Always check your case’s maximum GPU clearance against your card’s actual length before buying — this is one of the most common “it doesn’t fit” surprises.
4. Power Supply Wattage and Connectors
Two things matter here, not just one:
• Wattage:
Total system draw under load, with headroom (usually 20% extra recommended)
• Connectors:
Confirm your PSU has the correct GPU power connectors (6-pin, 8-pin, or newer 12VHPWR) — some high-end GPUs need adapters if your PSU is older
5. Cooler Clearance and Socket Support
CPU coolers need two checks: does it physically fit in your case (height clearance for air coolers, radiator size for liquid coolers), and does it support your CPU’s specific socket (most modern coolers do, but always verify for very new or very old sockets).
A Simple Pre-Purchase Checklist
• ☐ CPU socket matches motherboard
• ☐ RAM type (DDR4/DDR5) matches motherboard
• ☐ GPU length fits case clearance
• ☐ PSU wattage has 20% headroom over total system draw
• ☐ PSU has correct GPU power connectors
• ☐ CPU cooler fits case height and supports CPU socket
• ☐ Motherboard form factor fits case (ATX/mATX/ITX)
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