Oracle X5-8 Service Manual page 175

When the CPU is correctly positioned, there is no side-to-side movement of the CPU within the
socket.
To release the CPU from the tool, press the center button.
6.
This action is accompanied by a click sound as the tool opens and releases the CPU.
7. Remove the tool.
Inspect the CPU to ensure that it sits evenly within the socket.
8.
Install a Heatsink and Processor (FRU)
Servicing Components 175