Dell PowerEdge M820 Owner's Manual page 46

Figure 17. Removing and Installing a Heat Sink
1. heat sink
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.
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2. heat sink retention sockets (4)