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Mother Board Form Factors

To do system board upgrades & provide better recommendations to clients, technicians need to know their form factors. 1. AT Form Factor - Advanced Technology i. Invented by IBM in the early 1980's ii. Around 12" wide * 13" deep iii. Only designed to handle keyboard and monitor, lack of external ports required.  2.     ATX Form Factor - Advanced Technology Extended i. Designed by INTEL in 1995 ii. Around 12" * 9.6" in size iii. Built-in double high external I/O connector panel, hence external ports can be located directly on the board iv. Single main keyed internal power supply connector, hence the power connector is easy to plug & can't be installed incorrectly. v. Relocated CPU & memory next to the power supply which improved airflow cooling. Also reduced the interference with any bus expansion cards. vi. Relocated internal I/O connectors for the hard drives & the floppy drives near the drive bays to shorten the c...