Pre-Installed Accessory; Figure - Asus P4B-MX User Manual

Game/MIDI connector. This connector supports a joystick or a
22
game pad for playing games, and MIDI devices for playing or
editing audio files.
23
Serial ports. These two 9-pin COM1/COM2 ports are for pointing
devices or other serial devices.
24
Parallel port. This 25-pin port connects a parallel printer, a
scanner, or other devices.
PS/2 keyboard port. This purple 6-pin connector is for a PS/2
25
keyboard.
26 PS/2 mouse port. This green 6-pin connector is for a PS/2 mouse.

1.3.2 Pre-installed accessory

This motherboard is shipped with the heatsink retention module base
already installed. This module should fit the retention mechanism that
comes with a boxed CPU.
You do not have to remove the retention module base when installing
the CPU or installing other motherboard components.
Retention Module Base

Figure 1-2

Pre-installed Heatsink Retention Module Base
ASUS P4B-MX motherboard user guide 1-5