When enabled, this jumper allows a CPU Vcore setting range of +1.75V to +2.1V for P4 Willamette processor, and a 1.475V to 1.75V range for Northwood processor through BIOS Setup. When disabled, the allowed Vcore settings are lower. (This function is available on PCB R1.03 or later versions.)
Setting to a very high core voltage may cause permanent damage to the CPU. It is recommended that you keep the default setting (Disable).
This jumper allows you to enable or disable the onboard Local Area Network (LAN) feature. Keep the default setting Enabled if you wish to connect your computer to a network.
Chapter 2: Hardware information