Dell GX620 - 3.6GHz Desktop 1GB RAM 80GB Windows XP SFF User Manual page 234

Remove the heat sink.
3
Remove the memory module (see
a
heat sink.
Press the release lever on the retention base until the heat sink is released.
b
Gently lift the heat sink from the processor.
c
NOTICE:
Pull the release lever straight up until the processor is released, and then remove the processor
4
from the socket.
234
1
Lay the heat sink down on its top, with the thermal grease facing upward.
"Replacing/Adding Additional
1 top of heat sink
2 heat sink
3 retention base
4 release lever
Memory") closest to the
2
3
4