microATX Motherboard Interface Specification

Version 1.2

Page 5

6: Example Rear Panel I/O Connector Layout...........................................................................16

7: microATX Motherboard Maximum Component Height Restrictions ......................................18

8: 20-pin Main Power Supply Connector Configuration

(required for microATX) .........................................................................................................19

9: 2x2 Connector Configuration.................................................................................................20

10: 6-pin Optional Power Supply Connector Configuration .........................................................21

11: Simple Implementation of a Fan Monitor Circuit....................................................................22

Tables

1: microATX Feature Summary .................................................................................................6

2: Requirements to Mount microATX Motherboard in ATX 2.1-compliant Chassis ...................8

3: microATX and ATX Board Dimensions..................................................................................9

4: Motherboard Mounting Hole Locations..................................................................................9

5: Connector Locations..............................................................................................................11

6: Height Constraints .................................................................................................................17

7: Voltage Tolerances................................................................................................................21