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Connectors - overclock

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Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default position. Removing the cap will cause system boot failure! • If the steps above do not help, remove the onboard battery and move the jumper again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery. • You do not need to clear the RTC when the system hangs due to overclocking. For system failure due to overclocking, use the CPU Parameter Recall (C.P.R.) feature. Shut down and reboot the system, then the BIOS automatically resets parameter settings to default values. 1.8 Connectors 1.8.1 Rear panel connectors 1 2 34 10 9 8 7 6 5 1. PS/2 Mouse port (green). This port is for a PS/2 mouse. 2. LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN) through a network hub. LAN port LED indications Activity/Link LED Status Description OFF No link ORANGE Linked BLINKING Data activity Speed LED Status Description OFF 10Mbps connection ORANGE 100Mbps connection GREEN 1Gbps connection Activity Link Speed LED LED LAN port ASUS P8B75-M LX PLUS 1-23

Section	Page
Safety information	6
About this guide	6
P8B75-M LX PLUS specifications summary	8
Product introduction	11
1.1 Special features	11
1.1.1 Product highlights	11
1.1.2 ASUS Exclusive features	12
1.2 Before you proceed	15
1.3 Motherboard overview	15
1.3.1 Placement direction	15
1.3.2 Screw holes	16
1.3.3 Motherboard layout	17
1.3.4 Layout contents	18
1.4 Central Processing Unit (CPU)	19
1.4.1 Installing the CPU	20
1.4.2 CPU heatsink and fan assembly installation	22
1.5 System memory	24
1.5.1 Overview	24
1.5.2 Memory configurations	24
1.5.3 Installing a DIMM	30
1.5.4 Removing a DIMM	30
1.6 Expansion slots	31
1.6.1 Installing an expansion card	31
1.6.2 Configuring an expansion card	31
1.6.3 PCI slot	31
1.6.4 PCI Express 2.0 x1 slots	31
1.7 Jumpers	32
1.6.5 PCI Express 3.0/2.0 x16 slots	32
1.8 Connectors	33
1.8.1 Rear panel connectors	33
1.8.2 Internal connectors	35
1.9 Onboard LEDs	42
1.10 Software support	43
1.10.1 Installing an operating system	43
1.10.2 Support DVD information	43
1.10.3 Intel® SBA support	44
BIOS information	45
2.1 Managing and updating your BIOS	45
2.1.1 ASUS Update utility	45
2.1.2 ASUS EZ Flash 2	46
2.1.3 ASUS CrashFree BIOS 3 utility	47
2.1.4 ASUS BIOS Updater	48
2.2 BIOS setup program	50
BIOS menu screen	51
2.3 Main menu	54
2.3.1 System Language [English]	54
2.3.2 System Date [Day xx/xx/xxxx]	54
2.3.3 System Time [xx:xx:xx]	54
2.3.4 Security	54
2.4 Ai Tweaker menu	56
2.4.1 ASUS MultiCore Enhancement [Enabled]	56
2.4.2 Memory Frequency [Auto]	56
2.4.3 GPU Boost [OK]	57
2.4.4 DRAM Timing Control	57
2.4.5 CPU Power Management	60
2.5 Advanced menu	61
2.5.1 CPU Configuration	62
2.5.2 PCH Configuration	63
2.5.3 SATA Configuration	64
2.5.4 System Agent Configuration	65
2.5.5 AMT Configuration	66
2.5.6 USB Configuration	67
2.5.7 Onboard Devices Configuration	68
2.5.8 APM	69
2.5.9 Network Stack	69
2.6 Monitor menu	70
2.6.1 CPU Temperature / MB Temperature [xxxºC/xxxºF]	70
2.6.2 CPU / Chassis / Power Fan Speed [xxxx RPM] or [Ignore] / [N/A]	70
2.6.3 CPU Q-Fan Control [Enabled]	71
2.6.4 Chassis Q-Fan Control [Enabled]	71
2.6.5 CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage	72
2.6.6 Anti Surge Support [Enabled]	72
2.7 Boot menu	73
2.7.1 Bootup NumLock State [On]	73
2.7.2 Full Screen Logo [Enabled]	73
2.7.3 Wait for ‘F1’ If Error [Enabled]	74
2.7.4 Option ROM Messages [Force BIOS]	74
2.7.5 Setup Mode [EZ Mode]	74
2.7.6 UEFI/Legacy Boot [Enabled both UEFI and Legacy]	74
2.7.7 PCI ROM Priority [Legacy ROM]	74
2.7.8 Boot Option Priorities	74
2.7.9 Boot Override	74
2.8 Tools menu	75
2.8.1 ASUS EZ Flash 2 Utility	75
2.8.2 ASUS O.C. Profile	75
2.8.3 ASUS SPD Information	75
2.9 Exit menu	76
Appendices	77
Notices	77