Asus ROG Strix Z390-I Gaming - Onboard Switches

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Chapter 1: Product Introduction
Chapter 1
1.1.7 Onboard switches
Onboardswitchesallowyoutone-tuneperformancewhenworkingonabareoropen-
casesystem.Thisisidealforoverclockersandgamerswhocontinuallychangesettingsto
enhancesystemperformance.
1. MemOK! II switch (MemOK_II)
InstallingDIMMsthatarenotcompatiblewiththemotherboardmaycausesystem
bootfailure.Theswitchisenabledbydefault,allowingmemoryre-trainingwhenthe
motherboardisunresponsiveduetomemoryproblems.TheMEMOK_II_LEDwilllight
upwhilere-training,andturnoffwhenthere-trainingiscomplete.
• Refertosection1.1.8 Onboard LEDs fortheexactlocationoftheMEMOK_II_LED.
• TheDRAMLEDalsolightsupwhentheDIMMisnotproperlyinstalled.Turnoffthe
systemandreinstalltheDIMMbeforeusingtheMemOK!IIfunction.
• TheMemOK!IIswitchdoesnotfunctionunderWindows
®
OSenvironment.
• Duringthetuningprocess,thesystemloadsandtestspretestproles.Ittakesabout
30secondsforthesystemtotestonesetofproles.Ifthetestfails,thesystem
rebootsandteststhenextsetofproles.Thesystemwillrebootmultipletimeswhen
training,oncethesystemhascompletedthetrainingprocesstheMEMOK_II_LEDwill
turnoff,pleaserefrainfromdoinganythingbeforetheMEMOK_II_LEDturnsoff.
• Duetomemorytuningrequirement,thesystemautomaticallyrebootswheneach
proleistested.
• IfyouturnoffthecomputerandreplaceDIMMsduringthetuningprocess,thesystem
continuesmemorytuningafterturningonthecomputer.Tostopmemorytuning,turn
offthecomputerandunplugthepowercordforabout5–10seconds,thensetthe
MemOK!IIswitchtodisabled.
• EnsuretoreplacetheDIMMswithonesrecommendedintheMemoryQVL(Qualied
VendorsLists)atwww.asus.com.
• WerecommendthatyoudownloadandupdatetothelatestBIOSversionfrom
www.asus.comafterusingtheMemOK!IIfunction.
ON
OFF
ROG STRIX Z390-I GAMING MemOK! II switch
ON
OFF
MemOK_II