Overview
This lecture discusses the differences between common motherboard types, focusing on the ATX, microATX, and mini ITX form factors, and their relevance for computing scenarios and the A+ certification exam.
Motherboard Form Factors
- Motherboards differ mainly in size, component layout, power connectors, and cooling requirements.
- Larger motherboards (e.g., ATX) allow for more components and flexibility.
- Smaller motherboards are used where space is limited, such as media centers or small office computers.
ATX Motherboard
- ATX stands for Advanced Technology Extended and has been standard since 1995.
- Modern ATX boards use a 24-pin main power connector (older ones used 20-pin).
- Features more expansion slots and memory slots (e.g., four memory slots).
- Best for desktops requiring high performance and future upgrades.
MicroATX Motherboard
- MicroATX has a layout similar to ATX but is physically smaller.
- Uses the same mounting points and power connectors as ATX.
- Typically has fewer expansion and memory slots (e.g., one expansion slot, two memory slots).
- Suitable for systems needing fewer resources in a smaller case.
Mini ITX Motherboard
- Mini ITX is one of the smallest standard motherboard sizes.
- Shares mounting points with ATX, allowing installation in ATX cases.
- Ideal for compact builds, such as media streaming devices or single-purpose computers.
- Limited expansion and upgrade options due to small size.
Exam Relevance and Selection Criteria
- For the A+ exam, focus on differences between ATX, microATX, and mini ITX.
- Know which motherboard type is appropriate for various use cases (e.g., media center vs. desktop editing).
Key Terms & Definitions
- Motherboard — Main circuit board housing CPU, memory, storage, and other components.
- Form Factor — Physical size, layout, and connector standard of a motherboard.
- ATX — Large motherboard form factor, supports many components.
- MicroATX — Smaller than ATX, fewer slots, but compatible with ATX mounting/power.
- Mini ITX — Very small motherboard, minimal expandability, mounts in ATX cases.
Action Items / Next Steps
- Review A+ exam objective 3.5 regarding motherboards, CPUs, and add-on cards.
- Compare physical layouts and features for ATX, microATX, and mini ITX motherboards.