User Guide

Mac Pro (8x) Take Apart — Processors 78
Processors
The Mac Pro (8x) computer uses a special coating on the processor heatsink and processor to
manage the temperature in the computer. The silver-colored coating comes applied to the
underside of the heatsink and the top of the processor.
Use the following guidelines when handling the processor heatsink and/or processor:
• Wear disposable nitrile or latex gloves.
Avoid touching the silver-colored coating on the underside of the heatsink and the top of •
the processor.
Always make a visual inspection of new or existing heatsinks and processors before •
installing them in the computer. See “Processor Heatsink and Processor Visual Inspection
Instructions” in the Troubleshooting chapter for more information.
When removing or replacing the heatsink and/or processor, do not allow the heatsink to be •
separated from the processor for more than 30 minutes. The special coating on the heatsink
and processor degrades with exposure to air; more than 30 minutes exposure could result in
damage to the computer and a repeat, multi-part repair.
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
0LN, 0LS, 0LT, 0LU,
08S, 0GP
3.0 GHz (661-4611)
IMPORTANT:
If you need to install
a new heatsink or
processor, reassemble
the unit while you are
waiting for the new
part to arrive.