Dell XPS 600 - Manual (Page 116)

116
Removing and Installing Parts
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NOTICE:
If you are installing a processor
upgrade kit from Dell, discard the original
heat sink. If you are not installing a
processor upgrade kit from Dell, reuse the
original heat sink and blower when you
install your new processor.
6 Push down and out on the socket
release lever.
heat sink
retention base
retention tab