User manual
ASUS B150M-K D3
1-11
IRQ assignments
A B C D E F G H
PCIEx16 shared – – – – – – –
PCIEx1_1 shared – – – – – – –
PCIEx1_2 – shared – – – – – –
Realtek8111HLAN
Controller
– – – shared – – – –
USB3.0Controller shared – – – – – – –
SATAController shared – – – – – – –
HDAudioController shared – – – – – – –
1.6 Headers
1. Clear RTC RAM (2-pin CLRTC)
ThisheaderallowsyoutocleartheRealTimeClock(RTC)RAMinCMOS.Youcan
cleartheCMOSmemoryofdate,time,andsystemsetupparametersbyerasingthe
CMOSRTCRAMdata.TheonboardbuttoncellbatterypowerstheRAMdatain
CMOS,whichincludesystemsetupinformationsuchassystempasswords.
To erase the RTC RAM:
1. TurnOFFthecomputerandunplugthepowercord.
2. Useametalobjectsuchasascrewdrivertoshortthetwopins.
3. PlugthepowercordandturnONthecomputer.
4. Holddownthe<Del>keyduringthebootprocessandenterBIOSsetuptore-
enter data.
• Ifthestepsabovedonothelp,removetheonboardbatteryandshortthetwopins
againtocleartheCMOSRTCRAMdata.AfterclearingtheCMOS,reinstallthe
battery.
• YoudonotneedtocleartheRTCwhenthesystemhangsduetooverclocking.For
systemfailureduetooverclocking,usetheCPUParameterRecall(C.P.R.)feature.
Shutdownandrebootthesystem,thentheBIOSautomaticallyresetsparameter
settingstodefaultvalues.
CLRTC
+3V_BAT
GND
PIN 1
B150M-K D3
B150M-K D3 Clear RTC RAM