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Chapter 1: Product Introduction
Chapter 1
Refertosection1.1.8 Onboard LEDsfortheexactlocationofthePOSTStateLEDs
(DRAMLED).
TheDRAMLEDalsolightsupwhentheDIMMisnotproperlyinstalled.Turnoffthe
systemandreinstalltheDIMMbeforeusingtheMemOK!function.
TheMemOK!buttondoesnotfunctionunderWindows
®
OSenvironment.
Duringthetuningprocess,thesystemloadsandtestsfailsafememorysettings.It
takesabout30secondsforthesystemtotestonesetoffailsafesettings.Ifthetest
fails,thesystemrebootsandtestthenextsetoffailsafesettings.Theblinkingspeed
oftheDRAMLEDincreases,indicatingdifferenttestprocesses.
Duetomemorytuningrequirement,thesystemautomaticallyrebootswheneach
timingsetistested.IftheinstalledDIMMsstillfailtobootafterthewholetuning
process,theDRAMLEDlightscontinuously.ReplacetheDIMMswithones
recommendedintheMemoryQVL(QualiedVendorsLists)atwww.asus.com.
IfyouturnoffthecomputerandreplaceDIMMsduringthetuningprocess,thesystem
continuesmemorytuningafterturningonthecomputer.Tostopmemorytuning,turn
offthecomputerandunplugthepowercordforabout510seconds.
IfyoursystemfailstobootupduetoBIOSoverclocking,presstheMemOK!button
tobootandloadtheBIOSdefaultsettings.AmessagewillappearduringPOST
remindingyouthattheBIOShasbeenrestoredtoitsdefaultsettings.
WerecommendthatyoudownloadandupdatetothelatestBIOSversionfrom
www.asus.comafterusingtheMemOK!function.
3. MemOK! button (MemOK!)
InstallingDIMMsthatarenotcompatiblewiththemotherboardmaycausesystemboot
failure,andtheDRAMLEDlightscontinuously.PressandholdtheMemOK!button
untiltheDRAMLEDstartsblinkingtobeginautomaticmemorycompatibilitytuningfor
successfulboot.