Summary
Highlights
Despite having similar internal components like CPU, memory, and storage, computers vary greatly in size. This difference in size necessitates different motherboard form factors. Key considerations for motherboards include physical size, component layout, power connections, and airflow.
While there are over 40 types of motherboards, the A+ certification only requires knowledge of three: ATX, Micro-ATX, and ITX. The exam's objective is to understand which motherboard to choose for specific scenarios, such as media centers versus high-performance desktops.
ATX, standing for Advanced Technology Extended, has been a standard since 1995. It's the largest of the three discussed types, featuring current versions with a 24-pin main power connector (older versions had 20-pin). ATX motherboards like the Gigabyte GA-P67A-UD3P-B3 are large, offering multiple expansion and memory slots, suitable for powerful systems.
The Micro-ATX is smaller than the ATX but shares a similar layout, including identical mounting points and power connectors. It is a popular form factor that fits into a smaller space while still adhering to ATX standards. An example is the MSI H81M-P33, which has fewer resources like a single expansion slot and two memory slots, making design decisions critical in its smaller size.
The Mini-ITX is the smallest of the three motherboard types mentioned. Despite its small size, it retains the same mounting screw points as an ATX motherboard, allowing it to be installed in an ATX case. Its compact form factor is ideal for systems requiring a very small footprint, such as streaming media devices or single-task computers.