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DRAM DATA REF Voltage on CHA/B [Auto] - m specs

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IMC Voltage [Auto] Allows you to set the CPU Integrated Memory Controller voltage. The values range from 1.10V to 1.45V with a 0.05V interval. CPU PLL Voltage [Auto] Allows you to set the CPU PLL voltage. The values range from 1.80V to 2.10V with a 0.10V interval. 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. The system may need better cooling system to work stably under high voltage settings. 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. DRAM Voltage [Auto] Allows you to set the DRAM voltage. The values range from 1.20V to 2.20V with a 0.15V or 0.10V interval. From 1.50V to 1.70V, the interval is 0.05V. 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. Load-Line Calibration [Auto] [Auto] [Disabled] [Enabled] Automatic configuration. Follow Intel specifications. Improve CPU VDroop directly. PCIE Spread Spectrum [Disabled] [Auto] Automatic configuration. [Disabled] Enhances the PCIE overclocking ability. [Enabled] Sets to [Enabled] for EMI control. 2-16 ASUS P7H55

Section	Page
Notices	6
Safety information	7
About this guide	7
P7H55 specifications summary	9
Product introduction	12
1.1 Welcome!	12
1.2 Package contents	12
1.3 Special features	12
1.3.1 Product highlights	12
1.3.2 Innovative ASUS features	13
1.4 Before you proceed	16
1.5 Motherboard overview	17
1.5.1 Placement direction	17
1.5.2 Screw holes	17
1.5.3 Motherboard layout	18
1.5.4 Layout contents	18
1.6 Central Processing Unit (CPU)	19
1.6.1 Installing the CPU	19
1.6.2 Installing the CPU heatsink and fan	22
1.6.3 Uninstalling the CPU heatsink and fan	23
1.7 System memory	24
1.7.1 Overview	24
1.7.2 Memory configurations	25
1.7.3 Installing a DIMM	26
1.7.4 Removing a DIMM	26
1.8 Expansion slots	27
1.8.1 Installing an expansion card	27
1.8.2 Configuring an expansion card	27
1.8.3 PCI slots	27
1.8.4 PCI Express x1 slots	27
1.8.5 PCI Express x16 slot	27
1.9 Jumpers	28
1.10 MemOK! switch	30
1.11 Connectors	31
1.11.1 Rear panel connectors	31
1.11.2 Internal connectors	32
1.12 Software support	38
1.12.1 Installing an operating system	38
1.12.2 Support DVD information	38
BIOS information	39
2.1 Managing and updating your BIOS	39
2.1.1 ASUS Update utility	39
2.1.2 ASUS EZ Flash 2	40
2.1.3 ASUS CrashFree BIOS	41
2.1.4 ASUS BIOS Updater	41
2.2 BIOS setup program	44
2.2.1 BIOS menu screen	45
2.2.2 Menu bar	45
2.2.3 Navigation keys	45
2.2.4 Menu items	45
2.2.5 Submenu items	46
2.2.6 Configuration fields	46
2.2.7 Pop-up window	46
2.2.8 Scroll bar	46
2.2.9 General help	46
2.3 Main menu	46
2.3.1 System Time [xx:xx:xx]	47
2.3.2 System Date [Day xx/xx/xxxx]	47
2.3.3 SATA1~6	47
2.3.5 System Information	48
2.3.4 Storage Configuration	48
2.4 Ai Tweaker menu	49
2.4.1 Ai Overclock Tuner [Auto]	49
2.4.2 CPU Ratio Setting [Auto]	50
2.4.3 Intel(R) SpeedStep(TM) Tech [Enabled]	50
2.4.4 Intel(R) TurboMode Tech [Enabled]	50
2.4.5 Xtreme Phase Full Power Mode [Auto]	50
2.4.6 DRAM Timing Control [Auto]	51
2.5 Advanced menu	55
2.5.1 CPU Configuration	55
2.5.2 Uncore Configuration	57
2.5.3 Onboard Devices Configuration	57
2.5.4 USB Configuration	57
2.5.5 PCIPnP	58
2.5.6 Intel VT-d [Disabled]	58
2.6 Power menu	58
2.6.1 Suspend Mode [Auto]	59
2.6.2 ACPI 2.0 Support [Enabled]	59
2.6.3 ACPI APIC Support [Enabled]	59
2.6.4 APM Configuration	59
2.6.5 Hardware Monitor	60
2.7 Boot menu	61
2.7.1 Boot Device Priority	61
2.7.2 Boot Settings Configuration	62
2.7.3 Security	62
2.8 Tools menu	63
2.8.1 ASUS O.C. Profile	64
2.8.2 AI NET 2	64
2.8.3 ASUS EZ Flash 2	64
2.8.4 Express Gate [Auto]	64

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2-16

ASUS P7H55

IMC Voltage [Auto]

Allows you to set the CPU Integrated Memory Controller voltage. The values range from

1.10V to 1.45V with a 0.05V interval.

CPU PLL Voltage [Auto]

Allows you to set the CPU PLL voltage. The values range from 1.80V to 2.10V with a 0.10V

interval.

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.

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

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.

DRAM Voltage [Auto]

Allows you to set the DRAM voltage. The values range from 1.20V to 2.20V with a 0.15V or

0.10V interval. From 1.50V to 1.70V, the interval is 0.05V.

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.

Load-Line Calibration [Auto]

[Auto]

Automatic conﬁguration.

[Disabled]

Follow Intel speciﬁcations.

[Enabled]

Improve CPU VDroop directly.

PCIE Spread Spectrum [Disabled]

[Auto]

Automatic conﬁguration.

[Disabled]

Enhances the PCIE overclocking ability.

[Enabled]

Sets to [Enabled] for EMI control.