Asus A55BM-A USB3 A55BM-A USB3 User's Manual - Page 19

ASUS A55BM-A/USB3

1-11

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

–

–

–

–

On Chip USB EHCI 1/2/3

–

shared

–

–

–

–

–

–

On Chip USB OHCI 1/2/3/4

–

–

shared

–

–

–

–

–

1.6

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.

A55BM-A/USB3

A55BM-A/USB3 Clear RTC RAM

1

2

2

3

Normal

(Default)

Clear RTC

CLRTC

Section	Page
Safety information	4
About this guide	4
Package contents	6
A55BM-A/USB3 specifications summary	6
Product introduction	9
1.1 Before you proceed	9
1.2 Motherboard overview	10
1.3 Accelerated Processing Unit (APU)	12
1.4 System memory	15
1.5 Expansion slots	18
1.6 Jumpers	19
1.7 Connectors	21
1.8 Software support	29
BIOS information	31
2.1 Managing and updating your BIOS	31
2.2 BIOS setup program	35
2.3 My Favorites	39
2.4 Main menu	40
2.5 Ai Tweaker menu	41
2.6 Advanced menu	42
2.7 Monitor menu	42
2.8 Boot menu	43
2.9 Tools menu	44
2.10 Exit menu	44
Appendices	45
Notices	45

Asus A55BM-A USB3 A55BM-A USB3 User's Manual - Page 19

Jumpers, PCI Express x1 slot - card

Page 19 highlights