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Motherboards

Motherboards are the unsung heroes in the PC. If the CPU is the “brains” of the computer, the motherboard is the “heart” of the PC. It is responsible for practically all the communication and physical connections. The vintage Advanced Technology (AT) and Baby AT motherboards of the 1990s are not a major focus on the A+ exam. You need to know that they supported mostly ISA expansion cards and have 66-MHz buses.

Advanced Technology Extended (ATX) motherboards have been continually upgraded and modified over the past 15 years. There have been letter designations along the way to thicken the alphabet soup. The ATX and its offspring make up the majority of the current marketplace. Table 30-1 describes the different motherboard form factors.


  

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