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ATX power connectors 24-pin EATXPWR; 8-pin EATX12V

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9. ATX power connectors (24-pin EATXPWR; 8-pin EATX12V) These connectors are for ATX power supply plugs. The power supply plugs are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit. Chapter 2 • For a fully configured system, we recommend that you use a power supply unit (PSU) that complies with ATX 12 V Specification 2.0 (or later version) and provides a minimum power of 350 W. • Do not forget to connect the 8-pin EATX12 V power plug; otherwise, the system will not boot. • We recommend that you use a PSU with higher power output when configuring a system with more power-consuming devices. The system may become unstable or may not boot up if the power is inadequate. • If you are uncertain about the minimum power supply requirement for your system, refer to the Recommended Power Supply Wattage Calculator at http://support.asus. com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details. Seventeam ST-522HLP Seventeam ST550EAJ-05F ASUS P-50GA ASUS P-55GA ASUS U-65GA ASUS U-75HA AXE-AA1000U-C Be quiet P6-PRO-850W Be quiet BN077 CoolerMaster RS-850EMBA Corsair CMPSU-620HX Corsair HX1000W EnerMAX EGX1000EWL HECHUAN ST-ATX330 Seasonic SS-460HS Seasonic SS-500GB Seasonic SS-500HM Seasonic SS-550HT Seasonic SS-600HT PSU suggested list T.C.STAR D420 OCZ ELITEXSTREAM 1000 Seasonic SS-900HP Snake PSH850V Silverstone SST-ST85F Silverstone ZM1200M Tagan TG1100-U33 Thermaltake W0132RE Thermaltake W0133RU Thermaltake W0171 AcBel API4PC24 Aelta GPS-550AB Be quiet BN073 CoolerMaster RS-650 Seventeam ST-420BKP Snake PSH500V Silverstone SST-ST50EF Silverstone PSU ST56ZF CoolerMaster RS-750 CWT PSH650V-D CWT PSH750V-D Delta GPS-350AB EnerMAX EG495AX-VE (E)(24P) EnerMAX ELT500AWT FSP FSP500-60GLN Gigabyte M550A-D1 Gigabyte P610A-C1 GoldenField ATX-S398 GoldenField ATX-S550 I-cuteAP-600S OCZ OCZ780MXS Seasonic SS-351HT Thermaltake TWV500W-AP Thermaltake PUREPower-600AP Zippy HP2-6500PE (G1) Zippy PSL6720P 2-40 Chapter 2: Hardware information

Section	Page
Contents	3
Notices	7
Safety information	8
About this guide	9
P7H55D-M EVO 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 ASUS Exclusive Overclocking Features	17
1.3.3 ASUS Xtreme Phase	17
1.3.4 ASUS Exclusive Features	17
1.3.5 ASUS Quiet Thermal Solutions	18
1.3.6 ASUS EZ DIY	18
Chapter 2: Hardware information	19
2.1 Before you proceed	19
2.2 Motherboard overview	20
2.2.1 Motherboard layout	20
2.2.2 Layout contents	21
2.2.3 Placement direction	22
2.2.4 Screw holes	22
2.3 Central Processing Unit (CPU)	23
2.3.1 Installing the CPU	23
2.3.2 Installing the CPU heatsink and fan	26
2.3.3 Uninstalling the CPU heatsink and fan	27
2.4 System memory	28
2.4.1 Overview	28
2.4.2 Memory configurations	29
2.4.3 Installing a DIMM	41
2.4.4 Removing a DIMM	41
2.5 Expansion slots	42
2.5.1 Installing an expansion card	42
2.5.2 Configuring an expansion card	42
2.5.3 Interrupt assignments	43
2.5.4 PCI slot	44
2.5.5 PCI Express 2.0 x1 slots	44
2.5.6 PCI Express 2.0 x16 slot	44
2.6 Jumper	45
2.7 Onboard switch	46
2.8 Connectors	47
2.8.1 Rear panel connectors	47
2.8.2 Audio I/O connections	50
2.8.3 Internal connectors	52
2.8.4. ASUS Q-Connector (system panel)	60
2.9 Onboard LEDs	61
2.10 Starting up for the first time	62
2.11 Turning off the computer	62
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	68
3.3 BIOS setup program	71
3.3.1 BIOS menu screen	71
3.3.2 Menu bar	71
3.3.3 Navigation keys	72
3.3.4 Menu items	72
3.3.5 Submenu items	72
3.3.6 Configuration fields	72
3.3.7 Pop-up window	72
3.3.8 Scroll bar	72
3.3.9 General help	72
3.4 Main menu	73
3.4.1 SATA 1–6	73
3.4.2 Storage Configuration	75
3.4.3 AHCI Configuration	76
3.4.4 System Information	76
3.5 Ai Tweaker menu	77
3.5.1 Ai Overclock Tuner [Auto]	77
3.5.2 CPU Ratio Setting [Auto]	78
3.5.3 Intel(R) SpeedStep(TM) Tech [Enabled]	78
3.5.4 Intel(R) TurboMode Tech [Enabled]	78
3.5.5 Xtreme Phase Full Power Mode [Auto]	79
3.5.6 BCLK Frequency [XXX]	79
3.5.7 PCIE Frequency [XXX]	79
3.5.8 DRAM Frequency [Auto]	79
3.5.9 QPI Frequency [Auto]	79
3.5.10 DRAM Timing Control	79
3.5.11 CPU Differential Amplitude [Auto]	81
3.5.12 CPU Clock Skew [Auto]	81
3.5.13 CPU Voltage Mode [Offset]	81
3.5.14 IMC Voltage [Auto]	81
3.5.15 DRAM Voltage [Auto]	81
3.5.16 CPU PLL Voltage [Auto]	82
3.5.17 PCH Voltage [Auto]	82
3.5.18 iGPU Voltage [Auto]	82
3.5.19 Load-Line Calibration [Auto]	82
3.5.20 CPU Spread Spectrum [Auto]	82
3.5.21 PCIE Spread Spectrum [Auto]	82
3.6 Advanced menu	83
3.6.1 CPU Configuration	83
3.6.2 Uncore Configuration	85
3.6.3 Onboard Devices Configuration	87
3.6.4 USB Configuration	88
3.6.5 PCIPnP	89
3.6.6 Intel VT-d [Disabled]	89
3.7 Power menu	90
3.7.1 Suspend Mode [Auto]	90
3.7.2 Repost Video on S3 Resume [No]	90
3.7.3 ACPI 2.0 Support [Disabled]	90
3.7.4 ACPI APIC Support [Enabled]	90
3.7.5 EuP Ready [Disabled]	90
3.7.6 APM Configuration	91
3.7.7 Hardware Monitor	92
3.8 Boot menu	94
3.8.1 Boot Device Priority	94
3.8.2 Boot Settings Configuration	95
3.8.3 Security	96
3.9 Tools menu	98
3.9.1 ASUS O.C. Profile	98
3.9.2 AI NET 2	99
3.9.3 ASUS EZ Flash 2	100
3.9.4 Express Gate [Auto]	100
3.10 Exit menu	101
Chapter 4: Software support	103
4.1 Installing an operating system	103
4.2 Support DVD information	103
4.2.1 Running the support DVD	103
4.2.2 Obtaining the software manuals	104
4.3 Software information	105
4.3.1 ASUS PC Probe II	105
4.3.2 ASUS AI Suite	106
4.3.3 ASUS Fan Xpert	107
4.3.4 ASUS TurboV	108
4.3.5 ASUS GPU Boost	109
4.3.6 ASUS Turbo Key	110
4.3.7 ASUS EPU	111
4.3.8 ASUS Express Gate	112