Asus P4P8X: 1.11 Jumpers
1.11 Jumpers: Asus P4P8X
1.11 Jumpers
1. Clear RTC RAM (CLRTC1)
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. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on
pins 2-3 for about 5~10 seconds, then move the cap back to pins 1-2.
3. Plug the power cord and turn ON the computer.
4. Hold down the <Del> key during the boot process and enter BIOS setup
to re-enter data.
Except when clearing the RTC RAM, never remove the cap on CLRTC1 jumper
default position. Removing the cap will cause system boot failure!
P4P8X
ASUS P4P8X motherboard user guide
1-19
®
CLRTC1
12 23
Normal Clear CMOS
(Default)
P4P8X Clear RTC RAM
There is no need to clear the RTC when the system hands due to overclocking.
For system failure due to overclocking, use the C.P.R. (CPU Parameter Recall)
feature. Reboot the system and the BIOS will automatically reset the CPU
parameters to its previous setting.
2. USB device wake-up (3-pin USBPW12, USBPW34, USBPW56, USBPW78)
Set these jumpers to +5V to wake up the computer from S1 sleep mode (CPU
stopped, DRAM refreshed, system running in low power mode) using the
connected USB devices. Set to +5VSB to wake up from S3 and S4 sleep
modes (no power to CPU, DRAM in slow refresh, power supply in reduced
power mode).
The USBPWR12 and USBPWR34 jumpers are for the rear USB ports. The
USBPWR56 and USBPWR78 jumper is for the internal USB header that you
can connect to the front USB ports.
P4P8X
1. The USB device wake-up feature requires a power supply that can provide
at least 500mA on the +5VSB lead when these jumpers are set to +5VSB.
Otherwise, the system would not power up.
2. The total current consumed must NOT exceed the power supply capability
(+5VSB) whether under normal condition or in sleep mode.
1-20
Chapter 1: Product introduction
®
P4P8X USB Device Wake Up
3
21
2
+5V
+5VS
(Default)
USBPW12
B
USBPW34
3
21
2
+5V
+5VS
(Default)
B
USBPW56
USBPW78
3. Keyboard power (3-pin KBPWR)
This jumper allows you to enable or disable the keyboard wake-up feature. Set
this jumper to pins 2-3 (+5VSB) if you wish to wake up the computer when you
press a key on the keyboard (the default value is [Disabled]). This feature
requires an ATX power supply that can supply at least 1A on the +5VSB lead
and a corresponding setting in the BIOS. (see section 2.5.1 Power Up Control)
P4P8X
®
KBPWR
2312
+5V +5VSB
(Default)
P4P8X Keyboard Power Setting
Оглавление
- Contents
- Notices
- Safety information
- About this guide
- ASUS contact information
- P4P8X specifications summary
- P4P8X specifications summary
- 1.1 Welcome!
- 1.3 Special features
- 1.4 Motherboard components
- 1.5 Motherboard layout
- 1.6 Before you proceed
- 1.7 Motherboard installation
- 1.8 Central Processing Unit (CPU)
- 1.9 System memory
- 1.10 Expansion slots
- 1.11 Jumpers
- 1.12 Connectors
- 2.1 Managing and updating your BIOS
- 2.2 BIOS Setup program
- 2.3 Main menu
- 2.4 Advanced menu
- 2.5 Power menu
- 2.6 Boot menu
- 2.7 Exit menu
- 3.1 Install an operating system
- 3.3 Software information
