User Guide

Mac Pro (8x) Take Apart — Processors 82
Replacement Note: Before installing a new, replacement processor, remove the protective
container covering the new processor. Transfer the container to the original processor before
returning it to Apple.
Replacement Note: When installing the processor on the logic board, align the processor notch
with the tab on the processor holder, as illustrated. Then lower the processor straight down onto
the socket.
Note: Unlike in earlier Power Mac G5 computers, replacing a processor in Mac Pro (8x) does not
require running Apple Service Diagnostic for thermal calibration.
Important: For the new processor to perform properly, the logic board must be upgraded to the
latest version of the BootROM. You can download the latest version from the Apple support web
site: http://www.apple.com/support/downloads/
Specically, see KnowledgeBase article 303880, “Firmware Updates for Intel-based Macs.”
IMPORTANT:
If you are installing a
new processor, do not
remove it from its
vacuum-packed bag
until you are ready to
install it. Be sure to
follow all directions
for unpacking the
processor that are
included in its packing
box.