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Chapter 2 Hardware Installation
2.1.3 Installing the Processor Heatsink
NOTE :
The processor heatsink for CPU1 and CPU2 is different. FXXCA91X91HS is
for CPU1, while FXXEA91X91HS2 is for CPU2. Mislocating the heatsink
will cause serious thermal damage.
• If present, remove the protective film covering the Thermal Interface
Material on the bottom side of the heatsink (see letter A).
• Align the heatsink fins to the front and back of the chassis for correct
airflow. The airflow goes from front-to-back of the chassis (see letter B).
• Each heatsink has four captive fasteners and should be tightened in a
diagonal manner using the following procedure:
• Using a #2 Phillips* screwdriver, start with screw 1 and engage screw
threads by giving it two rotations and stop (see letter C). (Do not fully
tighten.)
• Proceed to screw 2 and engage screw threads by giving it two
rotations and stop (see letter D). Similarly, engage screws 3 and 4.
• Repeat steps C and D by giving each screw two rotations each time
until each screw is lightly tightened up to a maximum of 8 inch-lbs
torque (see letter E).
SB151-LB User's Manual
CAUTION:
Do not over-tighten fasteners.
B
3
D
2
E
4
TIM
A
11
C
1
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