Thermalgrease
Thethermalgreasemustbereplacedwhenevertheheatsinkhasbeenremovedfromthetopofthe
microprocessorandisgoingtobereusedorwhendebrisisfoundinthegrease.Usethisinformationto
replacedamagedorcontaminatedthermalgreaseonthemicroprocessorandheatsink.
Whenyouareinstallingtheheatsinkonthesamemicroprocessorthatitwasremovedfrom,makesure
thatthefollowingrequirementsaremet:
•Thethermalgreaseontheheatsinkandmicroprocessorisnotcontaminated.
•Additionalthermalgreaseisnotaddedtotheexistingthermalgreaseontheheatsinkandmicroprocessor.
•Readthesafetyinformationthatbeginson“Safety”onpagev.
•Readthe“Installationguidelines”onpage34.
•Read“Handlingstatic-sensitivedevices”onpage36.
Toreplacedamagedorcontaminatedthermalgreaseonthemicroprocessorandheatsink,completethe
followingsteps:
Step1.Placetheheatsinkonacleanworksurface.
Step2.Removethecleaningpadfromitspackageandunfolditcompletely.
Step3.Usethecleaningpadtowipethethermalgreasefromthebottomoftheheatsink.
Note:Makesurethatallofthethermalgreaseisremoved.
Step4.Useacleanareaofthecleaningpadtowipethethermalgreasefromthemicroprocessor;then,
disposeofthecleaningpadafterallofthethermalgreaseisremoved.
Step5.Usethethermal-greasesyringetoplace9uniformlyspaceddotsof0.02mleachonthetopof
themicroprocessor.Theoutermostdotsmustbewithinapproximately5mmoftheedgeofthe
microprocessor;thisistoensureuniformdistributionofthegrease.
Microprocessor
0.02 mL of thermal
grease
Figure68.Thermalgreasedistribution
Note:Ifthegreaseisproperlyapplied,approximatelyhalfofthegreasewillremaininthesyringe.
Figure69.Syringe
Chapter2.Installingoptionaldevices79