User’s Manual

1-12
Chapter 1: Product introduction
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Mem_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Mem_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Mem_LEDwillturn
off,pleaserefrainfromdoinganythingbeforetheMem_LEDturnsoff.
• Duetomemorytuningrequirement,thesystemautomaticallyrebootswheneach
proleistested.IftheinstalledDIMMsstillfailtobootafterthewholetuningprocess,
andtheMem_LEDisturnedoff,pleaserefertotheQ-codeLEDandQ-codetablefor
more details on the error.
• 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.
• 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Mem_LEDwilllightup
whilere-training,andturnoffwhenthere-trainingiscomplete.
• EnsuretoreplacetheDIMMswithonesrecommendedintheMemoryQVL(Qualied
VendorsLists)atwww.asus.com.
• Thecomputerwillrebootmultipletimesduringthetuningprocess,
• WerecommendthatyoudownloadandupdatetothelatestBIOSversionfrom
www.asus.comafterusingtheMemOK!IIfunction.
ON
OFF
PRIME Z390-P MemOK! switch
ON
OFF
MemOK!_II