Asus P4B - Manual (Page 23)

ASUS P4B motherboard user guide 2-1
2.1 Motherboard installation
Before you install the motherboard, study the configuration of your chassis
to ensure that the motherboard fits into it. The P4B uses the ATX form
factor that measures 12 inches x 8.6 inches, a standard fit for most
chassis.
Do not overtighten the screws! Doing so may damage the
motherboard.
Figure 2-1 Motherboard placement and screw holes
2.1.1 Placement direction
When installing the motherboard, make sure that you place it into the
chassis in the correct orientation. The edge with external ports goes to the
rear part of the chassis. Refer to the image below.
2.1.2 Screw holes
Place six (6) screws into the holes indicated by circles to secure the
motherboard to the chassis.
Make sure to unplug the power cord before installing or removing the
motherboard. Failure to do so may cause you physical injury and
damage motherboard components.
Place this side towards
the rear of the chassis