I’d like to share these basic rules to help anyone planning to build a PC avoid costly mistakes and make sure everything will work together. Below is a table with the most essential compatibility rules. Hope this is helpful, and feel free to add anything I might have missed!
Rule - What to check / Why it matters
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CPU ↔ Motherboard socket / Socket must match (e.g., AM5 CPU requires an AM5 Socket etc). If they don’t match, the motherboard won’t power on or the CPU simply won’t fit.
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CPU brand ↔ Chipset support / Intel CPUs require Intel-compatible chipsets; AMD CPUs require AMD-compatible chipsets. Each chipset only supports certain CPU generations.
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CPU model ↔ RAM type (DDR4 vs DDR5) / Some CPU + motherboard combinations support either DDR4 or DDR5. Always choose the RAM type that your CPU supports.
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CPU TDP ↔ Cooler mounting & cooling capability / Make sure the CPU cooler is compatible with the CPU socket and can handle the CPU’s thermal output (TDP). More powerful CPUs generally require larger and more capable cooling systems.
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CPU Cooling System↔ Case clearance / Make sure the height of the air CPU cooler fits inside your PC case. Otherwise, if you choose to use an AIO liquid cooler instead, the case should have proper support and enough space for the liquid cooler radiator.
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Motherboard form factor ↔ Case form factor / ATX, micro-ATX, mini-ITX — the board and the case must match physically.
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Storage form factor ↔ Motherboard & Case / SSD M.2 devices need M.2 slots on the motherboard that supports (SATA or Nvme or both). 2.5" drives need SATA ports.
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Storage devices↔PC Case / Make sure your case has the appropriate number of drive bays for the SSDs or HDDs you plan to install.
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Motherboard↔GPU UEFI GOP / A modern graphics card require a UEFI-compatible firmware (most GPUs from the last decade are)
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GPU size & power↔ Case clearance & PSU / Check GPU length vs case clearance; check GPU power connectors and PSU wattage/headroom.
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GPU power ↔ PSU / PSU needs the correct connectors (for example, 8-pin PCIe, or dual 8-pin PCIe, or modern 12VHPWR etc) and enough wattage to properly power the GPU.
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PSU↔Motherboard & CPU / The PSU needs the correct connectors for the motherboard (typically a 24-pin and an 8-pin) and enough wattage to properly power the CPU.
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PSU↔Case clearance / Check PSU dimensions vs case clearance
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Windows 11 requirements / CPU supported by MS Windows 11; The motherboard must support UEFI, TPM 2.0, and Secure Boot. GPU compatible with DirectX 12 or later, with a WDDM 2.0 driver.
Windows 11 supported Intel processors https://learn.microsoft.com/en-us/windows-hardware/design/minimum/supported/windows-11-supported-intel-processors
Windows 11 supported AMD processors https://learn.microsoft.com/en-us/windows-hardware/design/minimum/supported/windows-11-supported-amd-processors

