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• For the Type A cooling assembly, see the instructions below.

• For the Type B cooling assembly, see page 28.

• Make sure the levers on the

clamp are in the open position (spine 
up).

• Align the heatsink so that the 

fan cable is near the CPU fan 
connector on the motherboard 
(FAN1). 

• Place the heatsink on the CPU and 

inside the bracket. 

Make sure the heatsink is fully seated 
in the bracket on all 
sides.

• Press down on the clamp until all four 

hooks engage the slots in the bracket. 

Avoid using excessive force when 
pressing down on the clamp. 

• Close the levers simultaneously.

Closing the levers simultaneously 
applies clamping force equally over 
the CPU and bracket.

• Make sure the fan is securely attached 

to the top of the heatsink. 

In most cases, the fan is already 

attached to the heatsink. 

• Align the heatsink so that the fan 

cable is near the CPU fan connector 
(P1 FAN1) on the motherboard. 

• Place the heatsink on the CPU and 

inside the bracket. 

Make sure the heatsink is fully seated 
in the bracket on all sides.

• Insert the hook of the stationary clip 

arm into a bracket slot.

• Allow the clip to lay across the groove 

in the top of the heatsink.

• Hook the movable clip arm into the 

bracket slot on the other side of the 
heatsink. 

• Orient the other clip in the opposite 

direction and then install by repeating 
the previous step. The “opposite” 
orientation helps apply clamping 
force equally over the heatsink.

Avoid using excessive force when 
pressing down on the thumb tabs.

If you are installing a replacement CPU cooling assembly, secure the slack in the fan cable 
using a tie-wrap, if necessary. The tie-wrap prevents the fan cable from interfering with 
the CPU fan. Also, make sure the connector on the cable is securely attached to 
connector FAN1 on the motherboard.

Use the following procedures to remove and replace the CPU on the motherboard.

The CPU is installed in a Zero Insertion Force (ZIF) socket on the motherboard. Before 
you can remove the CPU from its socket you need to remove the cooling assembly from 
the CPU socket, as described on page 24. 

This section includes the following topics:

• “To remove the CPU” on page 30

• “To replace the CPU” on page 31

To release the CPU, flex the lever away from the retention post on the socket, and then 
lift the lever all the way up.

Removing/replacing a CPU