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Asus P7H55 USB3 User Guide - Page 32

Turbo Key II switch

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2. Turbo Key II switch This switch allows you to auto-tune your CPU to enhance the system performance. For ensuring the system performance, turn the switch setting to Enable when the system is powered off. • The LED near the Turbo Key II switch lights when the switch setting is turned to Enable. • If you clear the CMOS or load the BIOS setup defaults, the related overclocking items in the BIOS menu follow the current setting of the Turbo Key II switch. • If you change the switch setting to Enable under the OS environment, the Turbo Key II function will be activated after the next system bootup. • You may use the TurboV Auto Tuning, overclock in the BIOS setup program, and enable the Turbo Key II function at the same time. However, the system will use the last setting you have made. 1-20 Chapter 1: Product introduction

Section	Page
P7H55/USB3 specifications summary	9
Chapter 1: Product introduction	13
1.1 Before you proceed	13
1.2 Motherboard overview	14
1.2.1 Motherboard layout	14
1.2.2 Layout contents	14
1.3 Central Processing Unit (CPU)	15
1.3.1 Installing the CPU	15
1.3.2 Installing the CPU heatsink and fan	18
1.3.3 Uninstalling the CPU heatsink and fan	19
1.4 System memory	20
1.4.1 Overview	20
1.4.2 Memory configurations	21
1.4.3 Installing a DIMM	28
1.4.4 Removing a DIMM	28
1.5 Expansion slot	29
1.5.1 Installing an expansion card	29
1.5.2 Configuring an expansion card	29
1.5.3 PCI slots	29
1.5.4 PCI Express x1 slots	29
1.5.5 PCI Express 2.0 x16 slots	29
1.6 Jumpers	30
1.7 Onboard switches	31
1.8 Connectors	33
1.8.1 Rear panel connectors	33
1.8.2 Internal connectors	34
1.9 Installing an operating system	40
1.10 Support DVD information	40
1.10.1 Running the support DVD	40
Chapter 2: BIOS setup	41
2.1 Managing and updating your BIOS	41
2.1.1 ASUS Update	41
2.1.2 ASUS EZ Flash 2	42
2.1.3 ASUS CrashFree BIOS 3 utility	43
2.2 BIOS setup program	44
2.3 Main menu	44
2.3.1 SATA 1-6	45
2.3.2 Storage Configuration	46
2.3.3 AHCI Configuration	46
2.3.4 System Information	47
2.4 Ai Tweaker menu	48
2.4.1 CPU Level Up [Auto]	48
2.4.2 Ai Overclock Tuner [Auto]	49
2.4.3 CPU Ratio Setting [Auto]	49
2.4.4 Intel(R) SpeedStep(TM) Tech [Enabled]	50
2.4.5 Intel(R) TurboMode Tech [Enabled]	50
2.4.6 Xtreme Phase Full Power Mode [Auto]	50
2.4.7 DRAM Frequency [Auto]	50
2.4.8 QPI Frequency [Auto]	50
2.4.9 ASUS/3rd Party UI Priority [ASUS Utility]	50
2.4.10 OC Tuner [Turbo Profile]	51
2.4.11 Start auto tuning	51
2.4.12 DRAM Timing Control [Auto]	51
2.4.13 CPU Differential Amplitude [Auto]	53
2.4.14 CPU Clock Skew [Auto]	53
2.4.15 CPU Voltage Mode [Offset]	53
2.4.16 IMC Voltage [Auto]	53
2.4.17 DRAM Voltage [Auto]	53
2.4.18 CPU PLL Voltage [Auto]	54
2.4.19 PCH Voltage [Auto]	54
2.4.20 DRAM DATA REF Voltage on CHA/B [Auto]	54
2.4.21 Load-Line Calibration [Auto]	54
2.4.22 CPU Spread Spectrum [Auto]	54
2.4.23 PCIE Spread Spectrum [Auto]	54
2.5 Advanced menu	55
2.5.1 CPU Configuration	55
2.5.2 Uncore Configuration	57
2.5.3 Onboard Device Configuration	57
2.5.4 USB Configuration	57
2.5.5 PCIPnP	58
2.5.6 Intel VT-d Configuration [Disabled]	58
2.6 Power menu	59
2.6.1 Suspend Mode [Auto]	59
2.6.2 Repost Video on S3 Resume [No]	59
2.6.3 ACPI 2.0 Support [Disabled]	59
2.6.4 ACPI APIC Support [Enabled]	59
2.6.5 EuP Ready [Disabled]	59
2.6.6 APM Configuration	60
2.6.7 Hardware Monitor	61
2.7 Boot menu	62
2.7.1 Boot Device Priority	62
2.7.2 Boot Settings Configuration	62
2.7.3 Security	63
2.8 Tools menu	65
2.8.1 ASUS O.C. Profile	65
2.8.2 AI NET 2	65
2.8.3 ASUS EZ Flash 2	66
2.8.4 Express Gate [Auto]	66