User Guide

Mac Pro (8x) Take Apart — Processor Heatsinks 76
If you are replacing the lower processor heatsink with a new heatsink, install the bumper •
included in the parts box on the side of the heatsink.
Visually inspect the gasket on the underside of the heatsink. See “1. Visual Inspection of
Heatsink Gasket” earlier in this procedure.
Carefully align the posts on the lower heatsink with the mounting holes in the logic board, 2.
and lower the heatsink onto the processor.
Lightly tighten the heatsink mounting screws in the order indicated below. 3.
To secure the heatsink to the processor, again tighten the screws in the order indicated.4.
Repeat steps 1–4 for the upper processor heatsink.5.