User Manual

ASUS P9A-I Series

2-13

2.7 Jumpers

1. Clear RTC RAM (3-pin 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 onboard button cell battery powers the RAM data in

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

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 CLRTC jumper default

position. Removing the cap will cause system boot failure!

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

clear the CMOS RTC RAM data. After the CMOS clearance, reinstall the battery.

P9A-I

P9A-I Clear RTC RAM

1 2

2 3

Normal

(Default)

Clear RTC

CLRTC

2. SATA M.2 and SATA III selection (3-pin MSATA_SW1)

Set to pins 1–2 to allow the system to automatically enable the SATA M.2 or SATA III

controllers when SATA M.2 or SATA III devices are detected. Set to pins 2–3 to enable

the SATA M.2 controller with SATA III interface disabled.

P9A-I

Auto

(Default)

m2Sata

MSATA_SW1

P9A-I SATA M.2 and SATA III selection