Lenovo System x3550 M4 - Page 99

•Donottouchthethermalgreaseonthebottomoftheheatsinkafteryouremovetheplastic
cover.Touchingthethermalgreasewillcontaminateit.See“Thermalgrease”onpage86
formoreinformation.
Figure72.Thermalgrease
a.Removetheplasticprotectivecoverfromthebottomoftheheatsink.
b.Positiontheheatsinkoverthemicroprocessor.Theheatsinkiskeyedtoassistwithproper
alignment.
Figure73.Heatsinkinstallation
c.Alignandplacetheheatsinkontopofthemicroprocessorintheretentionbracket,thermal
materialsidedown.
d.Pressfirmlyontheheatsink.
e.Rotatetheheatsinkretentionmodulereleaselevertotheclosedpositionandhookit
underneaththelocktab.
Step11.Ifyouinstalledthesecondmicroprocessor,installthefourthandsixthfans(see“Replacinga
hot-swapfan”onpage244).
Ifyouhaveotherdevicestoinstallorremove,dosonow.Otherwise,goto“Completingtheinstallation”
onpage89.
Chapter2.Installingoptionaldevices85