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Asus SABERTOOTH 55i User Manual - Page 82

DRAM CTRL REF Voltage on CHA/B [Auto]

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3.5.17 PCH Voltage [Auto] Allows you to set the Platform Controller Hub voltage. The values range from 1.05V to 1.15V with a 0.10V interval. Current PCH Voltage Displays the current PCH voltage. • The values of the IMC Voltage, DRAM Voltage, and CPU PLL Voltage items are labeled in different color, indicating the risk levels of high voltage settings. Refer to the table below for details. • The system may need better cooling system to work stably under high voltage settings. IMC Voltage DRAM Voltage DRAM Voltage (OV DRAM Enabled) CPU PLL Voltage Blue 1.10000V- 1.16875V 1.5000V- 1.5625V 1.5000V- 1.5625V 1.80V-1.90V Yellow 1.17500V- 1.22500V 1.5750V- 1.6250V 1.5750V- 1.6250V 2.00V-2.10V Purple 1.23125V- 1.30000V 1.6375V- 1.6875V 1.6375V- 1.6875V N/A Red 1.30625V- 1.70000V 1.7000V- 2.0000V 1.7000V- 2.5000V N/A 3.5.18 DRAM DATA REF Voltage on CHA/B [Auto] Allows you to set the DRAM DATA Reference Voltage on Channel A/B. The values range from 0.395x to 0.630x with a 0.005x interval. Different ratio might enhance DRAM overclocking ability. 3.5.19 DRAM CTRL REF Voltage on CHA/B [Auto] Allows you to set the DRAM Control Reference Voltage on Channel A/B. The values range from 0.395x to 0.630x with a 0.005x interval. Different ratio might enhance DRAM overclocking ability. 3.5.20 [Auto] [Disabled] [Enabled] 3.5.21 [Auto] [Disabled] [Enabled] 3.5.22 [Auto] [Disabled] [Enabled] Load-Line Calibration [Auto] BIOS automatically adjusts the voltage. Follows the Intel specifications. Improves the CPU VDroop directly. CPU Spread Spectrum [Auto] Automatic configuration. Enhances the BCLK overclocking ability. Sets to [Enabled] for EMI control. PCIE Spread Spectrum [Auto] Automatic configuration. Enhances the PCIE overclocking ability. Sets to [Enabled] for EMI control. Chapter 3 3-20 Chapter 3: BIOS setup

Section	Page
Contents	3
Notices	7
Safety information	8
About this guide	9
SABERTOOTH 55i 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 “TUF ENGINE!” Power Design	17
1.3.3 “Ultimate COOL!” Thermal Solutions	17
1.3.4 “Safe & Stable!” Guardian Angel	18
1.3.5 ASUS exclusive features	18
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 2.0 x1 slots (2.5GT/s)	40
2.5.6 PCI Express 2.0 x16 slots	40
2.6 Jumpers	42
2.7 Onboard switches	43
2.8 Connectors	46
2.8.1 Rear panel connectors	46
2.8.2 Audio I/O connections	47
2.8.3 Internal connectors	50
2.8.4. ASUS Q-Connector (system panel)	59
2.9 Onboard LEDs	60
2.10 Starting up for the first time	61
2.11 Turning off the computer	61
Chapter 3: BIOS setup	63
3.1 Knowing BIOS	63
3.2 Updating BIOS	63
3.2.1 ASUS Update utility	64
3.2.2 ASUS EZ Flash 2 utility	66
3.2.3 ASUS CrashFree BIOS 3 utility	67
3.2.4 ASUS BIOS Updater	67
3.3 BIOS setup program	70
3.3.1 BIOS menu screen	70
3.3.2 Menu bar	70
3.3.3 Navigation keys	71
3.3.4 Menu items	71
3.3.5 Submenu items	71
3.3.6 Configuration fields	71
3.3.7 Pop-up window	71
3.3.8 Scroll bar	71
3.3.9 General help	71
3.4 Main menu	72
3.4.1 SATA 1-6	72
3.4.2 Storage Configuration	74
3.4.3 AHCI Configuration	75
3.4.4 System Information	75
3.5 Ai Tweaker menu	76
3.5.1 Ai Overclock Tuner [Auto]	76
3.5.2 CPU Ratio Setting [Auto]	77
3.5.3 Intel(R) SpeedStep(TM) Tech [Enabled]	77
3.5.8 DRAM Frequency [Auto]	78
3.5.9 QPI Frequency [Auto]	78
3.5.10 DRAM Timing Control	78
3.5.4 Intel(R) TurboMode Tech [Enabled]	78
3.5.5 Xtreme Phase Full Power Mode [Auto]	78
3.5.6 BCLK Frequency [XXX]	78
3.5.7 PCIE Frequency [XXX]	78
3.5.11 CPU Differential Amplitude [Auto]	80
3.5.12 CPU Clock Skew [Auto]	80
3.5.13 CPU Voltage Mode [Offset]	80
3.5.14 IMC Voltage [Auto]	81
3.5.15 DRAM Voltage [Auto]	81
3.5.16 CPU PLL Voltage [Auto]	81
3.5.17 PCH Voltage [Auto]	82
3.5.18 DRAM DATA REF Voltage on CHA/B [Auto]	82
3.5.19 DRAM CTRL REF Voltage on CHA/B [Auto]	82
3.5.20 Load-Line Calibration [Auto]	82
3.5.21 CPU Spread Spectrum [Auto]	82
3.5.22 PCIE Spread Spectrum [Auto]	82
3.6 Advanced menu	83
3.6.1 CPU Configuration	83
3.6.2 North Bridge Configuration	85
3.6.3 Onboard Devices Configuration	86
3.6.4 USB Configuration	87
3.6.5 PCIPnP	88
3.6.6 Intel VT-d [Disabled]	88
3.6.7 T.Probe [Enabled]	88
3.7 Power menu	89
3.7.1 Suspend Mode [Auto]	89
3.7.2 Repost Video on S3 Resume [No]	89
3.7.3 ACPI 2.0 Support [Disabled]	89
3.7.4 ACPI APIC Support [Enabled]	89
3.7.5 EuP Ready [Disabled]	89
3.7.6 APM Configuration	90
3.7.7 Hardware Monitor	91
3.8 Boot menu	92
3.8.1 Boot Device Priority	92
3.8.2 Boot Settings Configuration	93
3.8.3 Security	94
3.9 Tools menu	96
3.9.1 ASUS O.C. Profile	96
3.9.2 Drive Xpert Configuration	98
3.9.3 AI NET 2	99
3.9.4 ASUS EZ Flash 2	99
3.10 Exit menu	100
Chapter 4: Software support	101
4.1 Installing an operating system	101
4.2 Support DVD information	101
4.2.1 Running the support DVD	101
4.2.2 Obtaining the software manuals	102
4.3 Software information	103
4.3.1 ASUS PC Probe II	103
4.3.2 ASUS Fan Xpert	104
4.3.3 VIA® High Definition Audio utility	105
4.3.4 ASUS Drive Xpert	106
4.3.5 ASUS T.Probe	107
4.4 RAID configurations	108
4.4.1 RAID definitions	108
4.4.2 Installing Serial ATA hard disks	109
4.4.3 Setting the RAID item in BIOS	109
4.4.4 Intel® Matrix Storage Manager option ROM utility	109
4.5 Creating a RAID driver disk	113
4.5.1 Creating a RAID driver disk without entering the OS	113
4.5.2 Creating a RAID driver disk in Windows®	113
4.5.3 Installing the RAID driver during Windows® OS installation	114
4.5.4 Using a USB floppy disk drive	114
Chapter 5: Multiple GPU technology support	117
5.1 ATI® CrossFireX™ technology	117
5.1.1 Requirements	117
5.1.2 Before you begin	117
5.1.3 Installing two CrossFireX™ graphics cards	118
5.1.4 Installing the device drivers	119
5.1.5 Enabling the ATI® CrossFireX™ technology	119
5.2 NVIDIA® SLI™ technology	121
5.2.1 Requirements	121
5.2.2 Installing two SLI-ready graphics cards	121
5.2.3 Installing the device drivers	122

Match case Limit results 1 per page

3-20

Chapter 3: BIOS setup

Chapter 3

3.5.18

DRAM DATA REF Voltage on CHA/B [Auto]

Allows you to set the DRAM DATA Reference Voltage on Channel A/B. The values range from

0.395x to 0.630x with a 0.005x interval. Different ratio might enhance DRAM overclocking ability.

3.5.19

DRAM CTRL REF Voltage on CHA/B [Auto]

Allows you to set the DRAM Control Reference Voltage on Channel A/B. The values range from

0.395x to 0.630x with a 0.005x interval. Different ratio might enhance DRAM overclocking ability.

3.5.20

Load-Line Calibration [Auto]

[Auto]

BIOS automatically adjusts the voltage.

[Disabled]

Follows the Intel speciﬁcations.

[Enabled]

Improves the CPU VDroop directly.

3.5.21

CPU Spread Spectrum [Auto]

[Auto]

Automatic conﬁguration.

[Disabled]

Enhances the BCLK overclocking ability.

[Enabled]

Sets to [Enabled] for EMI control.

3.5.22

PCIE Spread Spectrum [Auto]

[Auto]

Automatic conﬁguration.

[Disabled]

Enhances the PCIE overclocking ability.

[Enabled]

Sets to [Enabled] for EMI control.

Blue

Yellow

Purple

Red

IMC Voltage

1.10000V–

1.16875V

1.17500V–

1.22500V

1.23125V–

1.30000V

1.30625V–

1.70000V

DRAM Voltage

1.5000V–

1.5625V

1.5750V–

1.6250V

1.6375V–

1.6875V

1.7000V–

2.0000V

DRAM Voltage (OV

DRAM Enabled)

1.5000V–

1.5625V

1.5750V–

1.6250V

1.6375V–

1.6875V

1.7000V–

2.5000V

CPU PLL Voltage

1.80V–1.90V

2.00V–2.10V

N/A

3.5.17

PCH Voltage [Auto]

Allows you to set the Platform Controller Hub voltage. The values range from 1.05V to 1.15V

with a 0.10V interval.

Current PCH Voltage

Displays the current PCH voltage.

•

The values of the

IMC Voltage

DRAM Voltage

, and

CPU PLL Voltage

items are

labeled in different color, indicating the risk levels of high voltage settings. Refer to the

table below for details.

•

The system may need better cooling system to work stably under high voltage settings.