Asus Crosshair III Formula - Manual (Page 36)

Place this side towards
the rear of the chassis
2.2.4 Placement direction
When installing the motherboard, ensure that you place it into the chassis in the
correct orientation. The edge with external ports goes to the rear part of the chassis
as indicated in the image below.
2.2.5 Screw holes
Place nine (9) screws into the holes indicated by circles to secure the motherboard
to the chassis.
DO NOT overtighten the screws! Doing so can damage the motherboard.
2-8 Chapter 2: Hardware information