7.VCORE over-voltage (3-pin OVER_VOLT)

When enabled, this jumper allows a CPU Vcore setting range of +1.75V to +2.1V for Pentium 4 Willamette processor, and a 1.50V to 1.75V range for Northwood processor through BIOS Setup. When disabled, the allowed Vcore settings are lower.

Setting to a very high core voltage may cause permanent damage to the CPU. It is recommended that you keep the default setting (Disable).

OVER_VOLT

 

3

2

2

1

 

DISABLE

ENABLE

(Default)

 

P4B266

P4B266 OVER_VOLT Setting

8.Line out selector (two 2-pin LO_L, LO_R) (on audio models only)

By default, these jumpers are shorted (jumper caps on) to route the signal from the audio controller to the rear panel Line Out jack to make it available for audio out devices such as speakers or a headphone. If you connect the Intel Front Panel audio cable to the IAPANEL connector (see page 2-31 for the location), remove the caps from these jumpers to allow automatic switching of audio signal between the rear panel Line Out jack and the Intel audio cable.

LO_L

BLOL

FLOL

LO_R

P4B266

BLOR

FLOR

P4B266 Internal Line Out Connectors

2-22

Chapter 2: Hardware information