Asus A55M-A/USB3 User Manual download pdf (Page 23)

1.5 System memory

1.5.1 Overview

This motherboard comes with two Double Data Rate 3 (DDR3) Dual Inline Memory Modules

(DIMM) sockets.

A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched

differently to prevent installation on a DDR2 DIMM socket. DDR3 modules are developed for

better performance with less power consumption.

The gure illustrates the location of the DDR3 DIMM sockets:

Channel Sockets

Channel A DIMM_A1

Channel B DIMM_B1

A55M-A/USB3

A55M-A/USB3 240-pin DDR3 DIMM sockets

DIMM_A1

DIMM_B1

ASUS A55M-A Series

1-11

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 77 78

Motherboard 1
First Edition 2
January 2013 2
Contents 3
BIOS information 4
Appendices 5
Safety information 6
About this guide 7
Typography 8
(continued on the next page) 9
User Guide 11
Product introduction 13
ASUS MyLogo2™ 15
ASUS CrashFree BIOS 3 15
1.2 Before you proceed 16
A55M-A/USB3 17
1.3.3 Motherboard layout 18
1.3.4 Layout contents 19
1.4.1 APU installation 20
ASUS A55M-A Series 21
1.5 System memory 23
1.5.2 Memory congurations 24
DDR3 1600 MHz capability 25
DDR3 1333 MHz capability 26
DDR3 1066 MHz capability 28
1.5.3 Installing a DIMM 29
1.6 Expansion slots 30
A55M-A/USB3 Clear RTC RAM 32
KB_USBPWB 33
1.8.1 Rear panel ports 34
1.8.2 Internal connectors 35
SPDIF_OUT 39
A55M-A/USB3 USB2.0 connectors 40
1.9 Software support 41
2.1.2 ASUS EZ Flash 2 44
Recovering the BIOS 45
2.1.4 ASUS BIOS Updater 46
Updating the BIOS le 47
2.2 BIOS setup program 48
Advanced Mode 50
Menu bar 50
2.3 Main menu 52
Administrator Password 53
User Password 53
2.4 Ai Tweaker menu 54
2.4.3 APU Multiplier [Auto] 55
2.4.4 NB Frequency [Auto] 55
2.4.6 DRAM Timing Control 56
2.4.8 DRAM Voltage [Auto] 56
2.4.9 SB 1.1V Voltage [Auto] 56
2.4.10 DIGI+ VRM 57
2.5 Advanced menu 58
2.5.2 SATA Conguration 60
2.5.3 USB Conguration 61
2.5.4 NB Conguration 61
2-20 ASUS A55M-A Series 62
2.5.6 APM 63
2.5.7 Network Stack 64
2.6 Monitor menu 65
2.7 Boot menu 67
2.7.1 Fast Boot [Enabled] 68
2.7.10 Secure Boot 70
2.7.9 CSM Parameters 70
2.7.12 Boot Override 71
2.8 Tools menu 72
2.9 Exit menu 73
2-32 ASUS A55M-A Series 74
ASUS contact information 77
DECLARATION OF CONFORMITY 78

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Asus A55M-A/USB3 User Manual Page 23

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