DFI CA331-NR - Manual (Page 23)

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2
Hardware Installation
Installing the Fan and Heat Sink
The CPU must be kept cool by using a CPU fan with heat sink. Without sufficient
air circulation across the CPU and heat sink, the CPU will overheat damaging both
the CPU and system board.
Note:
• Use only certified fan and heat sink.
• Your fan and heat sink package usually contains the fan and heat sink
assembly, and an installation guide. If the installation procedure in the
installation guide differs from the one in this section, please follow the
installation guide in the package.
1. On the solder side of the
board, match the retention
module base to the mount-
ing holes around the CPU
socket.
Retention module base
2. Apply a thin layer of thermal paste on top of the CPU. Do not spread the
paste all over the surface. When you later place the heat sink on top, the
compound will disperse evenly.
3. While holding the retention module base in position (step 1), place the fan
/ heat sink assembly on top of the CPU. The 4 screws around the heat sink
must match the screw holes of the retention module base. We strongly rec-
ommend using this type of fan / heat sink assembly because it provides ad-
equate cooling to the components of the system board.
Turn each Phillips head screw half way down first to initially stabilize the heat
sink onto the board, then finally tighten each screw.
Important:
Do not turn the first screw all the way down followed by the next and so on.
This is to avoid imbalance which might cause cracks or fractures to the CPU
and/or heat sink assembly.