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Chapter 1: Product introduction
1.7 Jumpers
Clear RTC RAM (3-pin 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.
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.
IRQ assignments for this motherboard
A B C D E F G H
Intel PCH SATA controller #0
– – – shared – – – –
Intel PCH SATA controller #1
– – – shared – – – –
Realtek 8111F controller
shared – – – – – – –
1.6.5 PCI Express 3.0/2.0 x16 slots
This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that
comply with the PCI Express specications.
P8B75-M LX PLUS
P8B75-M LX PLUS Clear RTC RAM
1 2 2 3
Normal
(Default)
Clear RTC
CLRTC