User Guide

Mac Pro Take Apart — Processor Heatsinks 71
Replacement Note: Before reinstalling an existing processor heatsink, follow these directions for
applying new thermal grease to the underside of the heatsink.
Using the alcohol pad included with the logic board or processor replacement part, clean o •
any used thermal grease from the processor and the bottom of the heatsink.
Using the thermal grease included with the logic board or processor replacement part, apply •
one dot of fresh grease to the raised square area on the bottom of the heatsink.
Spread the grease evenly across the square to a thickness of approximately 1 mm. •
Warning: Do not apply more grease than recommended. The grease must not overow the
heatsink and come in contact with the processor connector.
Carefully align the posts on the heatsink with the mounting holes in the logic board, and •
lower the heatsink straight down onto the processor.
To ensure the grease spreads evenly over the processor, lightly tighten the heatsink •
mounting screws in the order indicated below.
To ax the heatsink to the processor, again tighten the screws in the order indicated.•