Dell PowerEdge M820 Owner's Manual page 45

Figure 17. Removing and Installing a Heat Sink
1. heat sink
2. heat sink retention sockets (4)
3. heat sink retention screws (4)
6. Use a clean, lint-free cloth to remove any thermal grease from the surface of the processor shield.
CAUTION: The processor is held in its socket under strong pressure. Be aware that the release lever can spring up
suddenly if not firmly grasped.
7. Position your thumb firmly over the socket-release lever near the label marked OPEN 1st and release the lever from
the locked position by pushing down and out from under the tab. Rotate the socket-release lever upward.
8. Similarly, release the socket-release lever near the label marked CLOSE 1st from the locked position and rotate the
socket-release lever upward.
45