Dell PowerEdge 850 - Manual (Page 127)

15. Rotate the release lever back down until it snaps into place, securing the processor cover.
16. Install the heat sink.
a. Using a clean lint-free cloth, remove the existing thermal grease from the heat sink.
b. Apply thermal grease evenly to the top of the processor.
c. Place the heat sink onto the processor. See Figure 5 -9 .
d. Using a #2 Phillips screwdriver, tighten in a diagonal pattern the four captive screws that secure the heat sink to the system board. See Figure 5 -
9 .
17. Install the cooling shroud. See " Installing the Cooling Shroud ."
18. Close the system. See " Closing the System " in "Troubleshooting Your System."
As the system boots, it detects the presence of the new processor and automatically changes the system configuration information in the System Setup
program.
19. Press to enter the System Setup program, and check that the processor information matches the new system configuration.
See your User's Guide for instructions about using the System Setup program.
20. Run the system diagnostics to verify that the new processor operates correctly.
See " Running the System Diagnostics " for information about running the diagnostics and troubleshooting processor problems.
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NOTE: Use the heat sink that you removed earlier in this procedure.