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Memory conﬁgurations

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1.7.2 Memory configurations You may install 256 MB, 512 MB, 1 GB, and 2 GB unbuffered non-ECC DDR2 DIMMs into the DIMM sockets. Recommended memory configurations Mode Single-Channel Dual-channel Sockets DIMM_A1 DIMM_B1 - Populated Populated Populated - Populated • When using only one memory module, start installing the DDR2 DIMM from slot DIMM_A1 or DIMM_B1 for better overclocking capability. • Always use identical DDR2 DIMM pairs for dual channel mode. For optimum compatibility, we recommend that you obtain memory modules from the same vendor. • When installing total memory of 4GB capacity or more, Windows 32bit operation system may only recognize less than 3GB. Hence, a total installed memory of less than 3GB is recommended. The motherboard can support 4 GB physical memory on the operating system listed below. You may install a maximum of 2 GB DIMMs on each slot. 64-bit Windows® XP Professional x64 Edition Windows® Vista x64 Edition 1-14 Chapter 1: Product introduction

Section	Page
Notices	6
Safety information	7
About this guide	8
M2N68-AM specifications summary	10
Product introduction	13
1.1 Welcome!	14
1.2 Package contents	14
1.3 Special features	14
1.3.1 Product highlights	14
1.3.2 Innovative ASUS features	16
1.4 Before you proceed	18
1.5 Motherboard overview	19
1.5.1 Motherboard layout	19
1.5.2 Placement direction	20
1.5.3 Screw holes	20
1.6 Central Processing Unit (CPU)	21
1.6.1 Installing the CPU	21
1.6.2 Installing the heatsink and fan	23
1.7 System memory	25
1.7.1 Overview	25
1.7.2 Memory configurations	26
1.7.3 Installing a DIMM	31
1.7.4 Removing a DIMM	31
1.8 Expansion slots	32
1.8.1 Installing an expansion card	32
1.8.2 Configuring an expansion card	32
1.8.3 Interrupt assignments	33
1.8.4 PCI slots	34
1.8.5 PCI Express x1 slot	34
1.8.6 PCI Express x16 slot	34
1.9 Jumper	35
1.10 Connectors	36
1.10.1 Rear panel connectors	36
1.10.2 Internal connectors	37
BIOS setup	45
2.1 Managing and updating your BIOS	46
2.1.1 Creating a bootable floppy disk	46
2.1.2 ASUS EZ Flash 2 utility	48
2.1.3 AFUDOS utility	49
2.1.4 ASUS CrashFree BIOS 3 utility	51
2.1.5 ASUS Update utility	53
2.2 BIOS setup program	56
2.2.1 BIOS menu screen	57
2.2.2 Menu bar	57
2.2.3 Navigation keys	58
2.2.4 Menu items	58
2.2.5 Sub-menu items	58
2.2.6 Configuration fields	58
2.2.7 Pop-up window	58
2.2.8 Scroll bar	58
2.2.9 General help	58
2.3 Main menu	59
2.3.1 System Time	59
2.3.2 System Date	59
2.3.3 Legacy Diskette A	59
2.3.4 IDE Configuration	60
2.3.5 Primary IDE Master/Slave	61
2.3.6 SATA1, SATA2, SATA3, and SATA4	63
2.3.7 System Information	64
2.4 Advanced menu	65
2.4.1 JumperFree Configuration	65
2.4.2 CPU Configuration	68
2.4.3 Chipset	69
2.4.4 Onboard Devices Configuration	73
2.4.5 PCI PnP	74
2.4.6 USB Configuration	75
2.5 Power menu	77
2.5.1 Suspend Mode	77
2.5.2 ACPI Version Features	77
2.5.3 ACPI APIC Support	77
2.5.4 APM Configuration	78
2.5.5 Hardware Monitor	79
2.6 Boot menu	80
2.6.1 Boot Device Priority	80
2.6.2 Boot Settings Configuration	81
2.6.3 Security	82
2.7 Tools menu	84
2.7.1 ASUS EZ Flash 2	84
2.7.2 AI NET 2	85
2.8 Exit menu	86
Software support	87
3.1 Installing an operating system	88
3.2 Support DVD information	88
3.2.1 Running the support DVD	88
3.2.2 Drivers menu	89
3.2.3 Utilities menu	90
3.2.4 Make Disk menu	92
3.2.5 Manual menu	93
3.2.6 ASUS Contact information	93