Subject

    Computer Science

    Topic

    Computer Hardware

    Which form factor defines board size and I/O shield layout for mainstream desktops?

    ক)
    ATX
    খ)
    E-ATX only
    গ)
    BTX (dominant today)
    ঘ)
    NLX

    Explanation

    ATX standardized board dimensions, mounting holes, rear I/O layout, and PSU positioning. Micro-ATX and Mini-ITX are derivatives for smaller builds. BTX failed to replace ATX despite better airflow ideas. E-ATX is larger for high-end systems.

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