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Asus P5K SE EPU User Manual - Page 36

Memory conﬁgurations

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2.4.2 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 (1) Dual-channel (2) DIMM_A1 - Populated Populated Populated Sockets DIMM_A2 DIMM_B1 - Populated - - - Populated Populated Populated DIMM_B2 - Populated • You may install varying memory sizes in Channel A and Channel B. The system maps the total size of the lower-sized channel for the dual-channel configuration. Any excess memory from the higher-sized channel is then mapped for single-channel operation. • Always install DIMMs with the same CAS latency. For optimum compatibility, it is recommended that you obtain memory modules from the same vendor. • If you install four 1 GB memory modules, the system may only recognize less than 3GB because the address space is reserved for other critical functions. This limitation appears on Windows® XP/Vista 32-bit operation system which does not support Physical Address Extension (PAE). • If you install Windows® XP/Vista 32-bit operation system, a total memory of less than 3GB is recommended. • This motherboard does not support memory modules made up of 128 Mb chips. Notes on memory limitations • Due to chipset limitation, this motherboard can only support up to 8 GB on the operating systems 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 • Some old-version DDR2-800 DIMMs may not match Intel®'s On‑Die‑Termination (ODT) requirement and will automatically downgrade to run at DDR2-667. If this happens, contact your memory vendor to check the ODT value. • Due to chipset limitation, DDR2-800 with CL=4 will be downgraded to run at DDR2-667 by default setting. If you want to operate with lower latency, adjust the memory timing manually. 2-14 Chapter 2: Hardware information

Section	Page
Contents	3
Notices	7
Safety information	8
About this guide	9
P5K SE/EPU specifications summary	11
Chapter 1: Product introduction	13
1.1 Welcome!	15
1.2 Package contents	15
1.3 Special features	16
1.3.1 Product highlights	16
1.3.2 ASUS AI Lifestyle features	18
1.3.3 ASUS Stylish features	19
1.3.4 ASUS Intelligent Overclocking features	20
Chapter 2: Hardware information	21
2.1 Before you proceed	23
2.2 Motherboard overview	24
2.2.1 Placement direction	24
2.2.2 Screw holes	24
2.2.3 Motherboard layout	25
2.2.4 Layout contents	26
2.3 Central Processing Unit (CPU)	28
2.3.1 Installing the CPU	29
2.3.2 Installing the CPU heatsink and fan	31
2.3.3 Uninstalling the CPU heatsink and fan	33
2.4 System memory	35
2.4.1 Overview	35
2.4.2 Memory configurations	36
2.4.3 Installing a DIMM	40
2.4.4 Removing a DIMM	40
2.5 Expansion slots	41
2.5.1 Installing an expansion card	41
2.5.2 Configuring an expansion card	41
2.5.3 Interrupt assignments	42
2.5.4 PCI slots	43
2.5.5 PCI Express x1 slots	43
2.5.6 PCI Express x16 slot	43
2.6 Jumpers	44
2.7 Connectors	46
2.7.1 Rear panel connectors	46
2.7.2 Internal connectors	48
Chapter 3: Powering up	59
3.1 Starting up for the first time	61
3.2 Turning off the computer	62
3.2.1 Using the OS shut down function	62
3.2.2 Using the dual function power switch	62
Chapter 4: BIOS setup	63
4.1 Managing and updating your BIOS	65
4.1.1 ASUS Update utility	65
4.1.2 Creating a bootable floppy disk	68
4.1.3 ASUS EZ Flash 2 utility	69
4.1.4 AFUDOS utility	70
4.1.5 ASUS CrashFree BIOS 3 utility	72
4.2 BIOS setup program	73
4.2.1 BIOS menu screen	74
4.2.2 Menu bar	74
4.2.3 Navigation keys	74
4.2.4 Menu items	75
4.2.5 Sub-menu items	75
4.2.6 Configuration fields	75
4.2.7 Pop-up window	75
4.2.8 Scroll bar	75
4.2.9 General help	75
4.3 Main menu	76
4.3.1 System Time [xx:xx:xx]	76
4.3.2 System Date [Day xx/xx/xxxx]	76
4.3.3 Legacy Diskette A [1.44M, 3.5 in.]	76
4.3.4 SATA 1-4	77
4.3.5 SATA Configuration	78
4.3.6 System Information	79
4.4 Advanced menu	80
4.4.1 Jumperfree Configuration	80
4.4.2 AI NET 2	83
4.4.3 USB Configuration	84
4.4.4 CPU Configuration	85
4.4.5 Chipset	86
4.4.6 OnBoard Devices Configuration	87
4.4.7 PCI PnP	88
4.5 Power menu	89
4.5.1 Suspend Mode [Auto]	89
4.5.2 Repost Video on S3 Resume [Disabled]	89
4.5.3 ACPI Version [Disabled]	89
4.5.4 ACPI APIC Support [Enabled]	89
4.5.5 APM Configuration	90
4.5.6 Hardware Monitor	91
4.6 Boot menu	93
4.6.1 Boot Device Priority	93
4.6.2 Boot Settings Configuration	94
4.6.3 Security	95
4.7 Tools menu	97
4.7.1 ASUS EZ Flash 2	97
4.7.2 ASUS O.C. Profile	98
4.8 Exit menu	99
Chapter 5: Software support	101
5.1 Installing an operating system	103
5.2 Support CD information	103
5.2.1 Running the support CD	103
5.2.2 Drivers menu	104
5.2.3 Utilities menu	105
5.2.4 Manual menu	107
5.2.5 ASUS Contact information	107
5.2.6 Other information	108
5.3 Software information	110
5.3.1 ASUS MyLogo2™	110
5.3.2 Audio configurations	112
5.3.3 ASUS PC Probe II	116
5.3.4 ASUS AI Suite	122
5.3.5 ASUS EPU Utility -- AI Gear 3+	124
5.3.6 ASUS AI Nap	126
5.3.7 ASUS Q-Fan 2	127
5.3.8 ASUS AI Booster	128
Appendix: CPU features	129
A.1 Intel® EM64T	131
A.2 Enhanced Intel SpeedStep® Technology (EIST)	131
A.2.1 System requirements	131
A.2.2 Using the EIST	132
A.3 Intel® Hyper-Threading Technology	133