IBM System x3500 Installation And User Manual page 120

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IBM System x3500 M4 Type 7383: Installation and User's Guide
c. Align the installation tool with the microprocessor socket. The installation
tool rests flush on the socket only if properly aligned.
d. Twist the handle on the microprocessor tool counterclockwise to insert the
microprocessor into the socket. The microprocessor is keyed to ensure that
the microprocessor is installed correctly. The microprocessor rests flush on
the socket only if properly installed.
Attention:
v Do not press the microprocessor into the socket.
v Make sure that the microprocessor is oriented and aligned correctly in
the socket before you try to close the microprocessor retainer.
v Do not touch the thermal material on the bottom of the heat sink or on
top of the microprocessor. Touching the thermal material will
contaminate it.