A technician is building a custom PC and needs to install a motherboard that is compatible with most standard computer cases and power supplies, and that offers flexibility for expansion with multiple PCIe slots. What motherboard form factor should they choose?
The Advanced Technology eXtended (ATX) form factor is the most widely adopted desktop motherboard standard. It fits the mounting points and power-supply connectors used in the majority of mid-tower and full-tower cases and supports up to seven expansion slots, leaving plenty of room for multiple PCIe add-on cards. Smaller alternatives such as microATX (maximum four slots) and Mini-ITX or Nano-ITX (one slot or none) provide less expansion capacity and are intended for compact systems, making them less suitable when future PCIe expansion is a priority.
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