A motherboard is the main printed circuit board in a computer. It provides sockets and slots for the CPU, RAM, storage and expansion cards, plus the chipset, power connectors and ports that let them communicate.
Why it matters
The motherboard decides which components you can use and how many. Its socket must match the CPU, its slots the memory type, and its features set limits on storage ports, USB ports, networking and upgrade options.
Boards come in standard sizes such as ATX, Micro-ATX and Mini-ITX, which must fit the case.
Example
Planning a build, you might check a board's spec sheet:
Socket: matches your CPU
Memory: 4 DIMM slots, DDR5
Storage: 2 x M.2 NVMe, 4 x SATA
Expansion: 1 x PCIe x16If you wanted three NVMe drives, this board could not host them without an adapter.
Common mistakes
- Buying a CPU without checking socket and chipset compatibility.
- Ignoring that a BIOS update may be needed to support a newer CPU.
- Choosing a form factor that does not fit the case.
Related
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