User Guide

Mac Pro Take Apart — Processors 76
Processors
This procedure illustrates how to remove the lower processor (CPU B). The instructions are the
same for removing the upper processor (CPU A). You may, however, want to use a at-blade
screwdriver to release the latch on the upper processor.
Note: Every time you remove a processor, you must replace the thermal grease on the processor
heatsink. New grease and alcohol wipes for removing the previous grease are included with
replacement processors. Instructions for applying the grease are included with the processor
heatsinks procedure.
Identifying Version 1 and Version 2 Processors
There are two versions of the processor, Version 1 and Version 2, which must be replaced like-for-
like. In addition, both processors in a dual conguration must be the same version, either
Version 1 or Version 2. Dierent versions in the same computer could cause a system failure.
Note: You may still replace a single processor, but you must replace it like for like. There is no
performance advantage to either version of the processor.
To identify the correct processor for the computer you are repairing, please check its
conguration code (the last three alphanumeric characters in the serial number for the
computer). The following table lists the conguration codes that use Version 2 processors; all
other conguration codes use Version 1 processors. If you do not have the correct processor,
please order it from GSX.
Conguration Code Version 2 Processor
0KW, 0L0, 0L5, 0L7, 0LD, 0LE, 0LH, 0GP 2.0 GHz (661-4612)
0KT, 0GN, 0KY, 0KZ, 0L1, 0L2, 0L4, 0L6, 0L9, 0LA, 0LC, 0GP 2.66 GHz (661-4613)
0KV, 0KU, 0HA, 0KX, 0L3, 0L8, 0LB, 0LL, 0LM, 0LP, 0GP 3.0 GHz (661-4614)
Tools
No tools are required for this procedure. However, you may nd a at-blade screwdriver helpful in
releasing the processor holder latch.