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P9X79 WS MemOK! button

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5. MemOK! button Installing DIMMs that are incompatible with the motherboard may cause system boot failure, and the DIAG_DRAM near the MemOK! button lights continuously. Press and hold the MemOK! button until the DIAG_DRAM starts blinking to begin automatic memory compatibility tuning for successful boot. ® P9X79 WS MemOK! button • Refer to section 3.4 Onboard LEDs for the exact location of the DIAG_DRAM. • The DIAG_DRAM also lights when the DIMM is not properly installed. Turn off the system and reinstall the DIMM before using the MemOK! function. • The MemOK! button does not function under Windows™ OS environment. • During the tuning process, the system loads and tests failsafe memory settings. It takes about 30 seconds for the system to test one set of failsafe settings. If the test fails, the system reboots and test the next set of failsafe settings. The blinking speed of the DIAG_DRAM increases, indicating different test processes. • Due to memory tuning requirement, the system automatically reboots when each timing set is tested. If the installed DIMMs still fail to boot after the whole tuning process, the DIAG_DRAM lights continuously. Replace the DIMMs with ones recommended in the Memory QVL (Qualified Vendors Lists) in this user manual or on the ASUS website at www.asus.com. • If you turn off the computer and replace DIMMs during the tuning process, the system continues memory tuning after turning on the computer. To stop memory tuning, turn off the computer and unplug the power cord for about 5-10 seconds. • If your system fail to boot due to BIOS overclocking, press the MemOK! button to boot and load BIOS default settings. A messgae will appear during POST reminding you that the BIOS has been restored to its default settings. • We recommend that you download and update to the latest BIOS version from the ASUS website at www.asus.com after using the MemOK! function. 3-8 Chapter 3: Motherboard information

Section	Page
Notices	8
Safety information	9
About this guide	10
Chapter 1: Product introduction	13
1.1 System package contents	14
1.2 Serial number label	14
1.3 System specifications	15
1.4 Front panel features	17
1.5 Rear panel features	18
1.6 Internal features	19
1.7 LED information	20
1.7.1 Front panel LEDs	20
1.7.2 Rear panel LEDs	20
Chapter 2: Hardware setup	21
2.1 Chassis cover	22
2.1.1 Removing the side cover	22
2.1.2 Reinstalling the side cover	23
2.2 Motherboard overview	24
2.3 Central Processing Unit (CPU)	25
2.3.1 CPU installation	26
2.3.2 CPU heatsink and fan assembly installation	28
2.4 System memory	30
2.4.1 Overview	30
2.4.2 Memory configurations	31
2.4.3 Installing a DIMM	32
2.4.4 Removing a DIMM	32
2.5 Front panel assembly	33
2.5.1 Removing the front panel assembly	33
2.5.2 Reinstalling the front panel assembly	33
2.6 5.25-inch drives	34
2.7 SATA hard disk drives	35
2.7.1 Installing the HDD module cage	35
2.7.2 Removing the HDD module cage	36
2.7.3 Installing a hot-swap SATA hard disk drive	36
2.7.4 Removing and reinstalling the backplane	38
2.8 Expansion cards	39
2.8.1 Installing an expansion card	40
2.8.2 Configuring an expansion card	41
2.9 Cable connections	43
2.9.1 Motherboard connections	43
2.9.2 SATA backplane connections	44
2.10 Removable components	46
2.10.1 Removing rear system fan	46
2.10.2 Removing front system fan	47
Chapter 3: Motherboard Info	49
3.1 Motherboard layout	50
3.2 Jumpers	52
3.3 Onboard buttons and switches	54
3.4 Onboard LEDs	57
3.5 Connectors	64
3.5.1 Rear panel connectors	64
3.5.2 Audio I/O connections	65
3.5.3 USB BIOS Flashback	68
3.5.4 Internal connectors	69
3.5.5 ASUS Q-Connector (system panel)	81
Chapter 4: BIOS setup	83
4.1 Knowing BIOS	84
4.2 BIOS setup program	84
4.2.1 EZ Mode	85
4.2.2 Advanced Mode	86
4.3 Main menu	88
4.4 Ai Tweaker menu	90
4.4.1 DRAM Timing Control	94
4.4.2 DIGI+ Power Control	105
4.4.3 CPU Performance Settings	109
4.5 Advanced menu	114
4.5.1 CPU Configuration	115
4.5.2 System Agent Configuration	116
4.5.3 CPU Power Management Configuration	117
4.5.4 PCH Configuration	118
4.5.5 SATA Configuration	118
4.5.6 USB Configuration	121
4.5.7 Onboard Devices Configuraton	122
4.5.8 APM	124
4.6 Monitor menu	126
4.7 Boot menu	130
4.8 Tools menu	132
4.8.1 ASUS EZ Flash 2 Utility	132
4.8.2 ASUS DRAM SPD Information	133
4.8.3 ASUS O.C. Profile	134
4.8.4 ASUS Drive Xpert	135
4.9 Exit menu	136
4.10 Updating BIOS	137
4.10.1 ASUS Update utility	137
4.10.2 ASUS EZ Flash 2 utility	140
4.10.3 ASUS CrashFree BIOS 3 utility	141
4.10.4 ASUS BIOS Updater	142
Chapter 5: RAID configuration	145
5.1 RAID configurations	146
5.1.1 RAID definitions	146
5.1.2 Installing Serial ATA hard disks	147
5.1.3 Setting the RAID item in BIOS	147
5.1.4 Intel® Rapid Storage Technology Option ROM utility	147
5.1.5 Marvell RAID utility	151
Chapter 6: Driver installation	155
6.1 Creating a RAID driver disk	156
6.1.1 Creating a RAID driver disk without entering the OS	156
6.1.2 Creating a RAID driver disk in Windows®	156
6.1.3 Installing the RAID driver during Windows® OS installation	157
6.1.4 Using a USB floppy disk drive	157
6.2 Support DVD information	160
6.2.1 Running the support DVD	160
6.2.2 Obtaining the software manuals	161
6.3 Software information	162
6.3.1 AI Suite II	162
6.3.2 TurboV EVO	163
6.3.3 DIGI+ Power Control	167
6.3.4 EPU	169
6.3.5 FAN Xpert+	170
6.3.6 Sensor Recorder	171
6.3.7 Probe II	172
6.3.8 USB 3.0 Boost	173
6.3.9 ASUS SSD Caching	174
6.3.10 ASUS Update	175
6.3.11 MyLogo2	176
6.3.12 Audio configurations	179
6.4 System Recovery	180
6.4.1 Using the Recovery Partition	180
6.4.2 Using the Recovery DVD	180
Chapter 7: Multiple GPU technology support	183
7.1 AMD® CrossFireX™ technology	184
7.1.1 Requirements	184
7.1.2 Before you begin	184
7.1.3 Installing two CrossFireX™ graphics cards	185
5.1.4 Installing the device drivers	186
5.1.5 Enabling the AMD® CrossFireX™ technology	186
7.2 NVIDIA® SLI™ technology	187
7.2.1 Requirements	187
7.2.2 Installing two SLI-ready graphics cards	187
7.2.3 Installing three SLI-ready graphics cards	188
7.2.4 Installing four SLI-ready graphics cards	189
7.2.5 Installing the device drivers	190
7.2.6 Enabling the NVIDIA® SLI™ technology	190
7.3 NVIDIA® CUDA™ technology	193
7.3.1 Requirements	193

Match case Limit results 1 per page

Chapter 3: Motherboard information

3-8

MemOK! button

Installing DIMMs that are incompatible with the motherboard may cause system boot

failure, and the DIAG_DRAM near the MemOK! button lights continuously. Press and

hold the MemOK! button until the DIAG_DRAM starts blinking to begin automatic

memory compatibility tuning for successful boot.

•

Refer to section

3.4 Onboard LEDs

for the exact location of the DIAG_DRAM.

•

The DIAG_DRAM also lights when the DIMM is not properly installed. Turn off the

system and reinstall the DIMM before using the MemOK! function.

•

The MemOK! button does not function under Windows™ OS environment.

•

During the tuning process, the system loads and tests failsafe memory settings. It

takes about 30 seconds for the system to test one set of failsafe settings. If the test

fails, the system reboots and test the next set of failsafe settings. The blinking speed

of the DIAG_DRAM increases, indicating different test processes.

•

Due to memory tuning requirement, the system automatically reboots when each

timing set is tested. If the installed DIMMs still fail to boot after the whole tuning

process, the DIAG_DRAM lights continuously. Replace the DIMMs with ones

recommended in the Memory QVL (Qualiﬁed Vendors Lists) in this user manual or on

the ASUS website at www.asus.com.

•

If you turn off the computer and replace DIMMs during the tuning process, the system

continues memory tuning after turning on the computer. To stop memory tuning, turn

off the computer and unplug the power cord for about 5–10 seconds.

•

If your system fail to boot due to BIOS overclocking, press the MemOK! button to boot

and load BIOS default settings. A messgae will appear during POST reminding you

that the BIOS has been restored to its default settings.

•

We recommend that you download and update to the latest BIOS version from the

ASUS website at www.asus.com after using the MemOK! function.

P9X79 WS MemOK! button