Asus P4XP-X - Manual (Page 20)

1-10 Chapter 1: Product introduction
1.8 Central Processing Unit (CPU)
1.8.1 Overview
The motherboard comes with a DIP-type 478-pin Zero Insertion Force (ZIF) socket.
The socket is designed for the Intel
® Pentium ® 4 Processor in the 478-pin package
with 512KB L2 cache on 0.13 micron process. This processor supports 533/
400MHz front side bus (FSB), and allows data transfer rates up to 4.2GB/s or
3.2GB/s.
Note in the illustration that the CPU has a
gold triangular mark on one corner. This
mark indicates the processor Pin 1 that
should match a specific corner of the
CPU socket.
Incorrect installation of the CPU into the socket may bend the pins and
severely damage the CPU!
Gold Mark
1.8.2 Installing the CPU
Follow these steps to install a CPU.
1. Locate the 478-pin ZIF socket on the motherboard.
2. Unlock the socket by pressing the
lever sideways, then lift it up to a 90°-
100° angle.
3. Position the CPU above the socket
such that its marked corner matches
the base of the socket lever.
4. Carefully insert the CPU into the
socket until it fits in place.
Socket Lever 90 - 100
Gold Mark
The CPU fits only in one correct
orientation. DO NOT force the CPU into
the socket to prevent bending the pins
and damaging the CPU!
Make sure that the socket lever is lifted
up to 90°-100° angle, otherwise the
CPU does not fit in completely.