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6 jumpers, 4 pci express x1 slot, 5 pci express x16 slot – Asus A55BM-K User Manual

Page 19: Irq assignments for this motherboard

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ASUS A55BM-K

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-K

A55BM-K Clear RTC RAM

1 2

2 3

Normal

(Default)

Clear RTC

CLRTC