IBM x3100 M5 Type 5457 Installation And Service Manual page 323

v The microprocessor has two notches that are keyed to two tabs on the sides
of the socket.
v A triangle-shaped indicator on one corner of the microprocessor points to a
45-degree angle on the system board.
v Do not use excessive force when you press the microprocessor into the
socket.
6. Close the microprocessor bracket frame; then, close the microprocessor
retention latch and lock it securely in place.
Microprocessor
bracket frame
Microprocessor
release lever
Figure 225. Microprocessor socket levers and retainer engagement for 5U server model with
hot-swap power supplies
7. Install the heat sink:
Attention: Do not touch the thermal material on the bottom of the heat sink.
Touching the thermal material will contaminate it. If the thermal material on
the microprocessor or heat sink becomes contaminated, contact your service
technician.
a. Align the screw holes on the heat sink with the holes on the system board.
b. Tighten the screws with a screwdriver, alternating among the screws until
they are tight. If possible, each screw should be rotated two full rotations
at a time. Repeat until the screws are tight. Do not overtighten the screws
by using excessive force.
Microprocessor
Alignment
marks
System board
Chapter 6. Removing and replacing components
307