22ATX 12V connector. This power connector connects the 4-pin 12V plug from the ATX 12V power supply.

23Serial ports. These two 9-pin COM1/COM2 ports are for pointing devices or other serial devices.

24Parallel port. This 25-pin port connects a parallel printer, a scanner, or other devices.

25USB ports. These two 4-pin Universal Serial Bus (USB) ports are available for connecting USB devices such as a mouse and PDA.

26RJ-45 port. This port allows connection to a Local Area Network (LAN) through a network hub.

27PS/2 keyboard port. This purple 6-pin connector is for a PS/2 keyboard.

28PS/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-M motherboard user guide

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