User's Manual

ASUS B150M-A
1-11
IRQ assignments for this motherboard
A B C D E F G H
PCIEx16 shared – – – – – – –
PCIEx1_1 – – shared – – – – –
PCIEx1_2 – – – shared – – –
Realtek8111HLAN – – – shared – – –
USB3.0Controller shared – – – – – – –
SATAController shared – – – – – – –
HDAudio shared – – – – – – –
1.6 Headers
1. Clear RTC RAM (2-pin CLRTC)
ThisheaderallowsyoutocleartheRealTimeClock(RTC)RAMinCMOS.Youcan
cleartheCMOSmemoryofdate,time,andsystemsetupparametersbyerasingthe
CMOSRTCRAMdata.TheonboardbuttoncellbatterypowerstheRAMdatain
CMOS,whichincludesystemsetupinformationsuchassystempasswords.
To erase the RTC RAM:
1. TurnOFFthecomputerandunplugthepowercord.
2. Useametalobjectsuchasascrewdrivertoshortthetwopins.
3. PlugthepowercordandturnONthecomputer.
4. Holddownthe<Del>keyduringthebootprocessandenterBIOSsetuptore-
enter data.
• Ifthestepsabovedonothelp,removetheonboardbatteryandshortthetwopins
againtocleartheCMOSRTCRAMdata.AfterclearingtheCMOS,reinstallthe
battery.
• YoudonotneedtocleartheRTCwhenthesystemhangsduetooverclocking.For
systemfailureduetooverclocking,usetheCPUParameterRecall(C.P.R.)feature.
Shutdownandrebootthesystem,thentheBIOSautomaticallyresetsparameter
settingstodefaultvalues.
B150M-A
CLRTC
+3V_BAT GND
PIN 1
B150M-A Clear RTC RAM