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2.6 Jumpers CPU / DRAM Bus / QPI DRAM overvoltage setting (3-pin OV_CPU, 3-pin OV_DRAM_BUS, 3-pin OV_QPI_DRAM) These jumpers allow you to enable or disable the advanced CPU, DRAM Bus, and QPI DRAM overvoltage settings in BIOS. Read the following information before you change the jumper settings. Chapter 2 Pins 1-2 (Default) Pins 2-3 (OV Enabled) OV_CPU up to 1.70V up to 2.10V OV_DRAM_BUS up to 2.00V up to 2.46V OV_QPI_DRAM up to 1.70V up to 1.90V • Before you change the jumper settings for extra-high overvoltage ability, use the BIOS items first to adjust the desired CPU, DRAM, and QPI performance. Ensure that your system functions well under the highest BIOS voltage settings before you change the setting of these three jumpers. • DO NOT set the OV_CPU jumper to pins 2-3 when you install a new CPU and have not booted for the first time. Doing so may cause the system to halt. For system failure due to the wrong setting of the OV_CPU jumper, shut down the computer and move the cap back to pins 1-2. • According to Intel CPU spec, DIMMs with voltage requirement over 1.65V may damage the CPU permanently. We recommend you install the DIMMs with the voltage requirement below 1.65V. • The system may need a better cooling system (for example, a water-cooling system) to work stably under high voltage settings. 2-22 Chapter 2: Hardware information

Section	Page
Contents	3
Notices	7
Safety information	8
About this guide	9
P6X58D Premium specifications summary	11
Chapter 1: Product introduction	15
1.1 Welcome!	15
1.2 Package contents	15
1.3 Special features	16
1.3.1 Product highlights	16
1.3.2 ASUS unique features	17
1.3.3 ASUS exclusive overclocking features	19
Chapter 2: Hardware information	21
2.1 Before you proceed	21
2.2 Motherboard overview	22
2.2.1 Motherboard layout	22
2.2.2 Layout contents	23
2.2.3 Placement direction	24
2.2.4 Screw holes	24
2.3 Central Processing Unit (CPU)	25
2.3.1 Installing the CPU	25
2.3.2 Installing the CPU heatsink and fan	28
2.3.3 Uninstalling the CPU heatsink and fan	29
2.4 System memory	30
2.4.1 Overview	30
2.4.2 Memory configurations	31
2.4.3 Installing a DIMM	37
2.4.4 Removing a DIMM	37
2.5 Expansion slots	38
2.5.1 Installing an expansion card	38
2.5.2 Configuring an expansion card	38
2.5.3 Interrupt assignments	39
2.5.4 PCI slots	40
2.5.5 PCI Express x1 slot	40
2.5.6 PCI Express 2.0 x16 slots	40
2.6 Jumpers	42
2.7 Onboard switches	43
2.8 Connectors	45
2.8.1 Rear panel connectors	45
2.8.2 Audio I/O connections	46
2.8.3 Internal connectors	49
2.8.4 ASUS Q-Connector (system panel)	57
2.9 Starting up for the first time	58
2.10 Turning off the computer	58
Chapter 3: BIOS setup	59
3.1 Knowing BIOS	59
3.2 Updating BIOS	59
3.2.1 ASUS Update utility	60
3.2.2 ASUS EZ Flash 2 utility	62
3.2.3 ASUS CrashFree BIOS 3 utility	63
3.3 BIOS setup program	64
3.3.1 BIOS menu screen	64
3.3.2 Menu bar	64
3.3.3 Navigation keys	65
3.3.4 Menu items	65
3.3.5 Submenu items	65
3.3.6 Configuration fields	65
3.3.7 Pop-up window	65
3.3.8 Scroll bar	65
3.3.9 General help	65
3.4 Main menu	66
3.4.1 SATA 1–6	66
3.4.2 Storage Configuration	68
3.4.3 AHCI Configuration	69
3.4.4 System Information	69
3.5 Ai Tweaker menu	70
3.5.1 Ai Overclock Tuner [Auto]	70
3.5.2 CPU Ratio Setting [Auto]	71
3.5.3 Intel(R) SpeedStep(TM) Tech [Enabled]	71
3.5.4 Intel(R) TurboMode Tech [Enabled]	71
3.5.5 Xtreme Phase Full Power Mode [Auto]	71
3.5.6 BCLK Frequency [XXX]	71
3.5.8 DRAM Frequency [Auto]	72
3.5.9 UCLK Frequency [XXX]	72
3.5.10 QPI Link Data Rate [Auto]	72
3.5.11 DRAM Timing Control [Auto]	72
3.5.7 PCIE Frequency [XXX]	72
3.5.12 CPU Voltage Control [Manual]	74
3.5.13 CPU Voltage [Auto]	74
3.5.14 CPU PLL Voltage [Auto]	74
3.5.15 QPI/DRAM Core Voltage [Auto]	74
3.5.16 IOH Voltage [Auto]	75
3.5.17 IOH PCIE Voltage [Auto]	75
3.5.18 ICH Voltage [Auto]	75
3.5.19 ICH PCIE Voltage [Auto]	75
3.5.20 DRAM Bus Voltage [Auto]	75
3.5.21 DRAM DATA REF Voltage on CHA/B/C [Auto]	76
3.5.22 DRAM CTRL REF Voltage on CHA/B/C [Auto]	76
3.5.23 Load-Line Calibration [Auto]	76
3.5.24 CPU Differential Amplitude [Auto]	76
3.5.25 CPU Clock Skew [Auto]	76
3.5.26 CPU Spread Spectrum [Auto]	76
3.5.27 IOH Clock Skew [Auto]	76
3.5.28 PCIE Spread Spectrum [Auto]	76
3.6 Advanced menu	77
3.6.1 CPU Configuration	77
3.6.2 Chipset	80
3.6.3 Onboard Devices Configuration	80
3.6.4 USB Configuration	82
3.6.5 PCIPnP	83
3.7 Power menu	84
3.7.1 Suspend Mode [Auto]	84
3.7.2 Repost Video on S3 Resume [No]	84
3.7.3 ACPI 2.0 Support [Disabled]	84
3.7.4 ACPI APIC Support [Enabled]	84
3.7.5 EuP Ready [Disabled]	84
3.7.6 APM Configuration	85
3.7.7 Hardware Monitor	86
3.8 Boot menu	87
3.8.1 Boot Device Priority	87
3.8.2 Boot Settings Configuration	88
3.8.3 Security	89
3.9 Tools menu	91
3.9.1 ASUS EZ Flash 2	91
3.9.2 Express Gate [Auto]	92
3.9.3 ASUS O.C. Profile	93
3.9.4 AI NET 2	94
3.10 Exit menu	95
Chapter 4: Software support	97
4.1 Installing an operating system	97
4.2 Support DVD information	97
4.2.1 Running the support DVD	97
4.2.2 Obtaining the software manuals	98
4.3 Software information	99
4.3.1 ASUS PC Probe II	99
4.3.2 ASUS AI Suite	100
4.3.3 ASUS EPU	101
4.3.4 ASUS Fan Xpert	102
4.3.5 ASUS TurboV	103
4.3.6 ASUS Express Gate SSD	104
4.3.7 Audio configurations	105
4.4 RAID configurations	106
4.4.1 RAID definitions	106
4.4.2 Installing Serial ATA hard disks	107
4.4.3 Setting the RAID item in BIOS	107
4.4.4 Intel® Matrix Storage Manager option ROM utility	107
4.5 Creating a RAID driver disk	111
4.5.1 Creating a RAID driver disk without entering the OS	111
4.5.2 Creating a RAID driver disk in Windows®	111
4.5.3 Installing the RAID driver during Windows® OS installation	112
4.5.4 Using a USB floppy disk drive	113
Chapter 5: Multiple GPU technology support	115
5.1 ATI® CrossFireX™ technology	115
5.1.1 Requirements	115
5.1.2 Before you begin	115
5.1.3 Installing two CrossFireX™ graphics cards	116
5.1.4 Installing three CrossFireX™ graphics cards	117
5.1.5 Installing the device drivers	118
5.1.6 Enabling the ATI® CrossFireX™ technology	118
5.2 NVIDIA® SLI™ technology	120
5.2.1 Requirements	120
5.2.2 Installing two SLI-ready graphics cards	121
5.2.3 Installing three SLI-ready graphics cards	122
5.2.4 Installing the device drivers	123