2631Memoryslots
Thereare12memoryslotsonthesystemboard.Formoreinformation,see“Memorymoduleinstallation
rules”onpage81.
24Microprocessorsocket2
29Microprocessorsocket1
Iftheserverhastwomicroprocessors,eachofthemicroprocessorissecuredinthemicroprocessorsocket
onthesystemboard.Aheatsinkisinstalledabovethemicroprocessortoprovidecooling.Iftheserverhas
onlyonemicroprocessor,themicroprocessorsocket2isprotectedbyamicroprocessorsocketcover.
Systemboardjumpersandswitches
Thistopicprovidesinformationaboutthejumpersandswitchesonthesystemboard.
Ajumperisashortlengthofconductorusedtosetuporadjustprintedcircuitboards,suchasthesystem
boardofacomputer.Ajumperusuallyisencasedinanon-conductiveblockofplasticforconvenientuse
andtoavoidanypossibledamagetoalivecircuit.Jumperpinsarrangedingroupsonthesystemboardare
calledjumperblocks.Whentwoormorejumperpinsarecappedwithajumper,anelectricalconnectionis
madebetweenthemandtheequipmentisthusinstructedtoactivatecertainsettingsaccordingly.
Thefollowingillustrationshowsajumperinthedefaultsettingposition(pin1andpin2).Thisisthecorrect
positionfornormaloperation.
Figure30.Defaultjumpersetting
42ThinkServerRD340UserGuideandHardwareMaintenanceManual
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