Asus P4XP-X User Manual - Page 20

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 Mark 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! 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. Socket Lever Make sure that the socket lever is lifted up to 90°-100° angle, otherwise the CPU does not fit in completely. 90 - 100 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. 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! Gold Mark 1-10 Chapter 1: Product introduction