Asus P4B - Manual (Page 45)

ASUS P4B motherboard user guide 2-23
10. Clear RTC RAM (CLRCMOS)
This jumper allows you to clear the Real Time Clock (RTC) RAM in
CMOS. You can clear the CMOS memory of date, time, and system
setup parameters by erasing the CMOS RTC RAM data. The RAM
data in CMOS, that include system setup information such as system
passwords, is powered by the onboard button cell battery.
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
2. Remove the battery.
3. Place a jumper cap over the pins for a few seconds to short the
jumper. Remove the jumper cap.
4. Re-install the battery.
5. Plug the power cord and turn ON the computer.
6. Hold down the key during the boot process and enter BIOS
setup to re-enter data.
Refer to the illustration on the next page showing the CLRCMOS
location on the motherboard.
9. VCORE over-voltage (OVER_VOLT)
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 feature is present on PCB
R1.05 or later versions.)
P4B
®
P4B OVER_VOLT Setting
OVER_VOLT
Disable
1 2
(Default)
Enable
2 3
Setting to a very high core voltage may cause permanent damage to
the CPU. It is recommended that you keep the default setting
(Disable).