1.6.5PCI Express 3.0/2.0 x16 slot

This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that comply with the PCI Express specifications.

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

–

–

–

–

–

–

–

1.7Jumpers

1.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.

B75M-A

CLRTC

 

1

2

2

3

Normal

Clear RTC

(Default)

 

 

B75M-A Clear RTC RAM

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.

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Chapter 1: Product introduction