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9 jumpers, Jumpers -17 – Asus F1A55 User Manual

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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 key during the boot process and enter BIOS setup to reenter

data.

• 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 sufficient power when running CrossFireX™ mode.

See page 1-21 for details.

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

multiple graphics cards for better thermal environment.

VGA configuration

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

F1A55

F1A55 Clear RTC RAM

1 2

2 3

Normal

(Default)

Clear RTC

CLRTC

ASUS F1A55

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