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Form factor

pc

The physical size, shape, and configuration of a hardware component or device.

expanded

Form factor refers to the physical dimensions and layout of an electronic device, which determines its compatibility with other hardware. In computing, form factors are critical for ensuring that components like motherboards, power supplies, and cases are compatible in both size and connection interface.

examples

ATX motherboards measure 305 mm x 244 mm (12 in x 9.6 in) and are compatible with ATX chassis.

Commonly used in desktop tower computers due to their expandability and full-size slots.

Micro-ATX motherboards have a maximum size of 244 mm x 244 mm (9.6 in x 9.6 in) and fit both ATX and Micro-ATX cases.

Often chosen for budget systems with fewer slots and lower space requirements.

Mini-ITX motherboards measure 170 mm x 170 mm (6.7 in x 6.7 in) and require mini-ITX cases.

Preferred for compact builds such as home media centers or small form factor PCs.

related terms

Form factor for SSDs (M.2)
The M.2 form factor defines the physical specifications for solid-state drives (SSDs) in computing devices.
Format
The process of preparing a data storage device for use and setting up a file system.
Small Form Factor (SFF)
A technical specification for computer cases and systems that are significantly reduced in size compared to standard desktop PCs.
Capacity
The maximum amount that a system or component can contain or handle.
Case
The case is the enclosure that houses and protects the internal components of a personal computer.