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d.
Rotate the heat-sink release lever to the closed position and hook it underneath the lock tab.
Step 8.
Reinstall the microprocessor 2 air baffle (see
100).
Step 9.
Install the sixth fan (see
If you have other devices to install or remove, do so now. Otherwise, go to
page
100.
Thermal grease
The thermal grease must be replaced whenever the heat sink has been removed from the top of the
microprocessor and is going to be reused or when debris is found in the grease.
When you are installing the heat sink on the same microprocessor that is was removed from, make sure that
the following requirements are met:
• The thermal grease on the heat sink and microprocessor is not contaminated.
• Additional thermal grease is not added to the existing thermal grease on the heat sink and
microprocessor.
Notes:
• Read the safety information that begins on
• Read the
"Installation guidelines" on page
• Read
"Handling static-sensitive devices" on page
To replace damaged or contaminated thermal grease on the microprocessor and heat sink, complete the
following steps:
Step 1.
Place the heat sink on a clean work surface.
Step 2.
Remove the cleaning pad from its package and unfold it completely.
Step 3.
Use the cleaning pad to wipe the thermal grease from the bottom of the heat sink.
Note: Make sure that all of the thermal grease is removed.
Step 4.
Use a clean area of the cleaning pad to wipe the thermal grease from the microprocessor; then,
dispose of the cleaning pad after all of the thermal grease is removed.
Step 5.
Use the thermal-grease syringe to place 9 uniformly spaced dots of 0.02 mL each on the top of the
microprocessor. The outermost dots must be within approximately 5 mm of the edge of the
microprocessor; this is to ensure uniform distribution of the grease.
Figure 85. Thermal grease distribution
"Installing the microprocessor 2 air baffle" on page
"Installing a hot-swap fan assembly" on page
"Safety" on page
41.
43.
Microprocessor
75).
"Completing the installation" on
iii.
0.02 mL of thermal
grease
.
Chapter 2
Installing optional devices
99
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