Asus F1A75-M PRO User Manual download pdf (Page 28)

1.9 Jumpers

Clear RTC RAM (CLRTC)

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 onboard button cell battery powers the RAM data in

CMOS, which include system setup information such as system passwords.

Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default

position. Removing the cap will cause system boot failure!

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 reenter

data.

• If the steps above do not help, remove the onboard battery and move the jumper again

to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery.

• You do not need to clear the RTC when the system hangs due to overclocking. For

system failure due to overclocking, use the CPU Parameter Recall (C.P.R) feature. Shut

down and reboot the system so the BIOS can automatically reset parameter settings to

default values.

• In single VGA card mode, use the PCIe 2.0 x16_1 slot (blue) for a PCI Express x16

graphics card to get better performance.

• We recommend that you provide sufcient power when running CrossFireX™ mode.

See page 1-20 for details.

• Connect a chassis fan to the motherboard connector labeled CHA_FAN1/2 when using

multiple graphics cards for better thermal environment.

VGA conguration

PCI Express operating mode

PCIe x16_1 PCIe x16_2

Single VGA/PCIe card x16 (Recommended for single VGA card) N/A

Dual VGA/PCIe card x16 x4

F1A75-M PRO

F1A75-M PRO Clear RTC RAM

1 2 2 3

Normal

(Default)

Clear RTC

CLRTC

Chapter 1: Product introduction1-16

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Asus F1A75-M PRO User Manual Page 28

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