Asus B85M-G - PCI Express Slots and IRQ Assignments; Jumpers and System Configuration; Clear RTC RAM (3-pin CLRTC)

1-10
Chapter 1: Product introduction
1.5.3 PCI Express 2.0 x1 slots
ThismotherboardsupportsPCIExpressx1networkcards,SCSIcards,andothercardsthat
complywiththePCIExpressspecications.
1.5.4 PCI Express 3.0/2.0 x16 slot
ThismotherboardhasaPCIExpressx16slotthatsupportsPCIExpressx16graphiccards
complyingwiththePCIExpressspecications.
1.6 Headers and Jumpers
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.
IRQ assignments for this motherboard
A B C D E F G H
LAN
– – shared – – – – –
PCIEx16
shared – – – – – – –
PCIEx1_1
shared – – – – – – –
PCIEx1_2
– shared – – – – – –
IntelPCHSATAcontroller
– – – shared – – – –
HDAudio
– – – – – – shared –
USB2.0_1
– – – – – – – shared
USB2.0_2
– – – – shared – – –
USB3.0
– – – – – shared – –
B85M-G
B85M-G Clear RTC RAM
CLRTC
GND
PIN 1
+3V_BAT
E9884_B85M-G_v4_Manual.indb 10 2014/11/4 11:09:48