MSI A55M-E33 - Manual (Page 15)

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5
APU & Heatsink Installation
When installing a APU, always remember to install a APU heatsink. An APU heatsink
is necessary to prevent overheating and maintain system stability. Follow the steps
below to ensure correct APU and heatsink installation. Wrong installation can
damage both the APU and the motherboard.
. Pull the lever sideways away from the socket. Make sure to raise the lever up to
a 90-degree angle.
2. Look for the gold arrow of the APU. The gold arrow should point as shown in the
picture. The APU can only fit in the correct orientation.
3. If the APU is correctly installed, the pins should be completely embedded into
the socket and can not be seen. Please note that any violation of the correct
installation procedures may cause permanent damages to your motherboard.
4. Press the APU down firmly into the socket and close the lever. As the APU is
likely to move while the lever is being closed, always close the lever with your
fingers pressing tightly on top of the APU to make sure the APU is properly and
completely embedded into the socket.