Asus P4B266 - Manual (Page 44)

2-22 Chapter 2: Hardware information
8. 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).
7. Speaker selector (3-pin SPEECH)
This jumper allows you to select the speaker you wish to use for the
ASUS POST Reporter™ function. Set to pins 1-2 to use the internal
speaker (usually included in the chassis). Set to pins 2-3 if you
connected an external speaker to the Line Out jack (lime color) on the
rear panel.
P4B266
®
P4B266 Speaker Selector
SPEECH
LINEOUT BUZZER
(Default)
1 2 2 3
P4B266
®
ENABLE
(Default)
1
2
DISABLE
2
3
OVER_VOLT
P4B266 OVER_VOLT Setting