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Table Of Contents  CertiGuide to A+ (Core Hardware)
 9  Chapter 0001:  Power Supplies - System Board

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ATX Power Supply
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V  System Board Form Factors

As with power supplies, each system board design layout is known as a form factor. While not all computer systems fit the categories listed below, most do. Starting with the largest design, it is time to examine the AT.

Depending on the case design, several different form factors may be used when creating a system board. In late 1984, IBM released the PC- AT, featuring an 80286 CPU. Because of all the electronics involved, the system board was BIG, over a square foot of systemboard. The original AT power supply had inverted L- shape to accommodate space for the system board.

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