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ItemDescriptionARearchassis fanheaderBThermaldiode, locatedon processordieCProcessorfanheaderDFront chassisfan headerEThermaldiode, locatedon theIntelZ77Express ChipsetFAuxiliaryfan header Figure7. ThermalSensorsand FanHeaders IntelDesktop Board DZ77RE-75KTechnicalProductSpecification 1.12PowerManagement Power managementisimplementedatseverallevels,including: •Softwaresupport throughAdvancedConfigurationandPowerInterface(ACPI) •Hardwaresupport: .Power connector .Fanheaders .LANwakecapabilities .InstantlyAvailablePCtechnology .Wakefrom USB .PowerManagement Event signal(PME#) wake-up support .PCIExpress WAKE#signalsupport .WakefromConsumer IR .WakefromS5 .Power Supervisor .+5VStandbyPowerIndicatorLED 1.12.1ACPI ACPIgivestheoperatingsystemdirectcontrolover thepower managementandPlugandPlayfunctionsofacomputer.TheuseofACPIwiththisboardrequiresanoperatingsystemthat providesfullACPIsupport.ACPIfeaturesinclude: •PlugandPlay(includingbusanddeviceenumeration) •Power managementcontrolofindividualdevices,add-inboards(someadd-in boardsmayrequireanACPI-awaredriver),video displays,andharddiskdrives •Methodsforachievinglessthan15-watt systemoperationinthepower-on/standbysleepingstate •A Soft-offfeaturethat enablestheoperating systemtopower-offthecomputer •Support formultiplewake-upevents(seeTable9onpage38) •Support forafront panelpower andsleepmodeswitch Table7liststhesystemstatesbasedonhowlongthepowerswitchispressed, dependingon howACPIisconfiguredwith an ACPI-awareoperatingsystem. Table7.EffectsofPressingthePowerSwitch Ifthesystemis in this state… …andthepowerswitch is pressedfor…thesystementers this stateOff(ACPIG2/G5–Softoff) Less thanfoursecondsPower-on(ACPIG0–workingstate) On(ACPIG0–workingstate) Less thanfoursecondsSoft-off/Standby(ACPIG1–sleepingstate) On(ACPIG0–workingstate) Morethan sixsecondsFailsafe power-off(ACPIG2/G5–Softoff) Sleep(ACPIG1–sleepingstate) Less thanfoursecondsWake-up(ACPIG0–workingstate) Sleep(ACPIG1–sleepingstate) Morethan sixsecondsPower-off(ACPIG2/G5–Softoff) ProductDescription 1.12.1.1SystemStatesandPowerStates Under ACPI,theoperatingsystemdirectsallsystemanddevicepower statetransitions.Theoperatingsystemputsdevicesinandout oflow-powerstatesbasedonuser preferencesandknowledgeofhowdevicesarebeingusedbyapplications. Devicesthatarenotbeingusedcanbeturnedoff.Theoperatingsystemusesinformationfromapplicationsandusersettingstoput thesystemasawholeintoalow-powerstate. Table8liststhepowerstatessupportedbytheboardalong withtheassociatedsystempower targets.SeetheACPIspecificationfor acompletedescriptionofthevarioussystemandpowerstates. Table8. PowerStatesand Targeted SystemPower GlobalStatesSleeping StatesProcessor StatesDevice StatesTargetedSystemPower(Note1) G0–workingstateS0–workingC0–workingD0 –workingstate. Fullpower>30WG1–sleepingstateS3–SuspendtoRAM. Context savedtoRAM. No powerD3 –no powerexceptforwake-uplogic. Power< 5W(Note 2) G1–sleepingstateS4–Suspendtodisk. Context savedtodisk. No powerD3 –no powerexceptforwake-uplogic. Power< 5W(Note 2) G2/S5S5–Softoff. Context not saved. Coldboot isrequired. No powerD3 –no powerexceptforwake-uplogic. Power< 5W(Note 2) G3– mechanicaloffAC powerisdisconnectedfromthecomputer. Nopowertothesystem. No powerD3 –no powerforwake-uplogic, exceptwhenprovided bybatteryorexternalsource. Nopowertothesystem. Service canbe performedsafely. Notes: 1.Totalsystempowerisdependent on thesystemconfiguration, includingadd-in boardsandperipheralspoweredbythe systemchassis’powersupply. 2.Dependent on thestandbypowerconsumption ofwake-updevices usedinthe system. IntelDesktop Board DZ77RE-75KTechnicalProductSpecification 1.12.1.2Wake-up Devices and Events Table9liststhedevicesor specificeventsthatcanwakethecomputer fromspecific states. Table9.Wake-upDevicesandEvents Thesedevices/events can wakeupthecomputer……fromthis statePowerswitchS3,S4,S5(Note 1) RTCalarmS3,S4,S5(Note 1) LANS3,S4,S5(Note 1) USBS3PME#signalS3, S4,S5(Note 1) WAKE#S3,S4,S5(Note 1) ConsumerIRS3,S4,S5(Note 2) Notes: 1.S4impliesoperatingsystemsupport only. 2.Wake fromS4andS5is recommendedbyMicrosoft. NOTE Theuseofthesewake-upeventsfromanACPIstaterequiresanoperatingsystemthat providesfullACPIsupport.Inaddition,software,drivers,andperipheralsmust fullysupport ACPIwakeevents. Product Description 39 1.12.2 Hardware Support CAUTION Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities and Instantly Available PC technology features are used. Failure to do so can damage the power supply. The total amount of standby current required depends on the wake devices supported and manufacturing options. The board provides several power management hardware features, including: • Power connector • Fan headers • LAN wake capabilities • Instantly Available PC technology • Wake from USB • Power Management Event signal (PME#) wake-up support • PCI Express WAKE# signal support • Wake from Consumer IR • Wake from S5 • Power Supervisor • +5 V Standby Power Indicator LED LAN wake capabilities and Insta...