Asus A68HM-PLUS User Guide - Page 18

1-10

Chapter 1: Product introduction

1.5.4

PCI Express x1 slot

This motherboard supports PCI Express 2.0 x1 network cards, SCSI cards, and other cards

that comply with the PCI Express speciﬁcations.

1.5.5

PCI Express x16 slot

This motherboard supports one PCI Express 3.0/2.0 x16 graphics cards that comply with the

PCI Express speciﬁcations.

IRQ assignments for this motherboard

A

B

C

D

E

F

G

H

PCIEx16_1

–

–

shared

–

–

–

–

–

PCIEx1_1

shared

–

–

–

–

–

–

–

PCI1 slot

–

–

–

–

shared

–

–

–

Realtek LAN controller

–

–

shared

–

-

–

–

–

HD audio

shared

–

–

–

–

–

–

–

SATA controller

–

–

–

shared

–

–

–

–

OnChip USB EHCI 1/2/3

–

shared

–

–

–

–

–

–

OnChip USB OHCI 1/2/3/4

–

–

shared

–

–

–

–

–

OnChip XHCI controller

–

–

shared

–

–

–

–

–

1.6

Headers

Clear RTC RAM (2-pin CLRTC)

This header 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.

A68HM-E

A68HM-E Clear RTC RAM

CLRTC

+3V_BAT

GND

PIN 1

E9808_A68HM Series_Manual.indb

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2014/10/16

10:09:02

Section	Page
Safety information	4
About this guide	4
Package contents	6
A68HM Series specifications summary	6
Product introduction	9
1.1 Before you proceed	9
1.2 Motherboard overview	9
1.3 Accelerated Processing Unit (APU)	11
1.4 System memory	14
1.5 Expansion slots	17
1.6 Headers	18
1.7 Connectors	19
1.8 Software support	27
BIOS information	29
2.1 Managing and updating your BIOS	29
2.2 BIOS setup program	34
2.3 My Favorites	37
2.4 Main menu	38
2.5 Ai Tweaker menu	39
2.6 Advanced menu	40
2.7 Monitor menu	40
2.8 Boot menu	41
2.9 Tools menu	42
2.10 Exit menu	42
Appendices	43
Notices	43

Asus A68HM-PLUS User Guide - Page 18

Headers, PCI Express x1 slot - graphics card

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