Introduction
Mainboard Form Factor
The board is designed with MicroATX form factor - the new industry standard of chassis. The MicroATX form factor is essentially a Baby-AT baseboard rotated 90 degrees within the chassis enclosure and a new mounting configuration for the power supply. With these changes the processor is relocated away from the expansion slots, allowing them all to hold full length add-in cards. MicroATX defines a double height aperture to the rear of the chassis which can be used to host a wide range of onboard I/O. Only the size and position of this aperture is defined, allowing PC manufacturers to add new I/O features (e.g.; TV input, TV output, joystick, modem, LAN, etc.) to systems. This will help systems integra- tors differentiate their products in the marketplace, and better meet your needs.
•Smaller size promotes a smaller system size.
•I/O shield does not need to be retooled in an ATX 2.01 or later. Mainboard could be used in an ATX 2.01-compliant.
•A smaller power supply cam be used. High integration on mainboard reduces the system costs.
Expandable I/O
| Micro |
| ATX |
| Power |
PCI slots | Supply |
|
| Floppy / IDE | | |
| 3 1/2" | 5 1/4" |
| connectors |
| Bay | Bay |
| | |
| | | | |
Single chassis fan for system
CPU located near Power Supply
ATX power connector
Figure 2: Summary of Micro ATX chassis features