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Asus P7P55 LX JOOYON SI User Guide - Page 63

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The following items appear only when you set USB Support to [Enabled]. Legacy USB Support [Auto] [Disabled] Disables the function. [Enabled] Enables the support for USB devices on legacy operating systems (OS). [Auto] Allows the system to detect the presence of USB devices at startup. If detected, the USB controller legacy mode is enabled. If no USB device is detected, the legacy USB support is disabled. BIOS EHCI Hand-off [Enabled] [Disabled] Disables the function. [Enabled] Enables the support for operating systems without an EHCI hand‑off feature. 2.5.5 PCIPnP The PCIPnP menu items allow you to change the advanced settings for PCI/PnP devices. Plug And Play O/S [No] When set to [No], BIOS configures all the devices in the system. When set to [Yes] and if you install a Plug and Play operating system, the operating system configures the Plug and Play devices not required for boot. Configuration options: [No] [Yes] 2.5.6 Intel VT-d [Disabled] Enables or disables the Intel Virtualization Technology for Directed I/O. Configuration options: [Enabled] [Disabled] 2.6 Power menu The Power menu items allow you to change the settings for the Advanced Power Management (APM). Select an item then press to display the configuration options. Main Ai Tweaker BIOS SETUP UTILITY Advanced Power Boot Suspend Mode [Auto] ACPI 2.0 Support [Enabled] ACPI APIC Support [Enabled] APM Configuration Hardware Monitor Tools Exit Select the ACPI state used for System Suspend. ←→ Select Screen ↑↓ Select Item +- Change Option F1 General Help F10 Save and Exit ESC Exit v02.61 (C)Copyright 1985-2009, American Megatrends, Inc. Chapter 2: BIOS information 2-21

Section	Page
Notices	6
Safety information	7
About this guide	8
P7P55 LX specifications summary	10
Chapter 1	13
Product introduction	13
1.1 Welcome!	13
1.2 Package contents	13
1.3 Special features	13
1.3.1 Product highlights	13
1.3.2 Innovative ASUS features	14
1.4 Before you proceed	17
1.5 Motherboard overview	18
1.5.1 Placement direction	18
1.5.2 Screw holes	18
1.5.3 Motherboard layout	19
1.5.4 Layout contents	19
1.6 Central Processing Unit (CPU)	20
1.6.1 Installing the CPU	20
1.6.2 Installing the CPU heatsink and fan	23
1.6.3 Uninstalling the CPU heatsink and fan	24
1.7 System memory	25
1.7.1 Overview	25
1.7.2 Memory configurations	26
1.7.3 Installing a DIMM	30
1.7.4 Removing a DIMM	30
1.8 Expansion slots	31
1.8.1 Installing an expansion card	31
1.8.2 Configuring an expansion card	31
1.8.3 PCI slots	31
1.8.4 PCI Express x1 slots	31
1.8.5 PCI Express x16 slots	31
1.9 Jumpers	32
1.10 MemOK! switch	34
1.11 Connectors	35
1.11.1 Rear panel connectors	35
1.11.2 Internal connectors	36
1.12 Software support	42
1.12.1 Installing an operating system	42
1.12.2 Support DVD information	42
Chapter 2	43
BIOS information	43
2.1 Managing and updating your BIOS	43
2.1.1 ASUS Update utility	43
2.1.2 ASUS EZ Flash 2	44
2.1.3 ASUS CrashFree BIOS	45
2.1.4 ASUS BIOS Updater	45
2.2 BIOS setup program	48
2.2.1 BIOS menu screen	49
2.2.2 Menu bar	49
2.2.3 Navigation keys	50
2.2.4 Menu items	50
2.2.5 Submenu items	50
2.2.6 Configuration fields	50
2.2.7 Pop-up window	50
2.2.8 Scroll bar	50
2.2.9 General help	50
2.3 Main menu	51
2.3.1 System Time	51
2.3.2 System Date	51
2.3.3 SATA1~6	51
2.3.4 Storage Configuration	52
2.3.5 AHCI Configuration	53
2.3.6 System Information	53
2.4 Ai Tweaker menu	54
2.4.1 Ai Overclock Tuner	54
2.4.2 CPU Ratio Setting	55
2.4.3 Intel(R) SpeedStep(TM) Tech	55
2.4.4 Intel(R) TurboMode Tech	55
2.4.5 Xtreme Phase Full Power Mode	55
2.4.6 DRAM Frequency	56
2.4.7 QPI Frequency	56
2.4.8. DRAM Timing Control	56
2.4.9 CPU Clock Skew	58
2.4.10 VCore Over Voltage	58
2.4.11 IMC Voltage	59
2.4.12 CPU PLL Voltage	59
2.4.13 PCH Voltage	59
2.4.14 DRAM Voltage	59
2.4.15 Load-Line Calibration	59
2.5 Advanced menu	60
2.5.1 CPU Configuration	60
2.5.2 North Bridge Configuration	62
2.5.3 Onboard Devices Configuration	62
2.5.4 USB Configuration	62
2.5.5 PCIPnP	63
2.5.6 Intel VT-d	63
2.6 Power menu	63
2.6.1 Suspend Mode	64
2.6.2 ACPI 2.0 Support	64
2.6.3 ACPI APIC Support	64
2.6.4 APM Configuration	64
2.6.5 Hardware Monitor	65
2.7 Boot menu	66
2.7.1 Boot Device Priority	66
2.7.2 Boot Settings Configuration	67
2.7.3 Security	67
2.8 Tools menu	68
2.8.1 ASUS O.C. Profile	69
2.8.2 AI NET 2	69
2.8.3 Express Gate	69
2.8.4 ASUS EZ Flash 2	70