Apple mac pro early 2008 User Manual

Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors 81
Using a long-handled, magnetized 3 mm flathead hex screwdriver, loosen the four captive 5. 
mounting screws for the lower processor heatsink in the order indicated below. 
6. Carefully tilt the heatsink so that it clears the bottom lip of the enclosure and then lift the 
heatsink out of the computer.
IMPORTANT:
Remember that you 
cannot leave the 
heatsink separated 
from either the upper 
or lower processor for 
more than 30...

Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors 82
Visual Inspection of Heatsink Gasket
Before installing a new or existing heatsink, check that the gasket that surrounds the silver-
colored coating on the underside of the heatsink is in good condition, as illustrated below.
Replace the gasket if it shows obvious damage, such as cracks, folds, and broken-off surfaces, or 
if it is dislocated from the heatsink. The gasket is available through GSX as part of the Mac Pro 
Grease...

Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors 83
Using the pre-measured syringe of Krytox grease from the kit, evenly apply a bead of grease • 
around the full perimeter of the heatsink gasket. Apply the full syringe of grease to the 
gasket. 
Warning: Do not apply more grease than recommended. The grease must not overflow the 
heatsink and come in contact with the processor connector.
Do not apply any grease to the processor.• 
Installing New Processors
Do not apply new...

Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors 84
Replacement Instructions for Heatsink
Note: If you are re-installing an existing heatsink, go directly to step 1 below. If you are installing 
a replacement heatsink, first do the following:
Unpack the new heatsink according to the instructions included in the parts box.• 
• Remove the protective cap covering the underside of the heatsink and transfer it to the 
heatsink you are returning to Apple. 
Apply the top gasket...

Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors 85
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....

Mac Pro (Early 2008) Take Apart — Processor Heatsinks for 3.2 GHz Processors 86
Disposal Instructions
Place all disposable materials used in removing or replacing a processor heatsink or processor 
inside the resealable plastic bag included with the replacement module. (Disposable materials 
include such items as protective gloves, alcohol wipes, lint-free cleaning cloths, Krytox grease and 
syringe, suction pipette, and heatsink gasket.) Pack this bag along with the failed module in the 
box that the...

Mac Pro (Early 2008) Take Apart — Processors, 2.8 and 3.0 GHz 87
Processors, 2.8 and 3.0 GHz
This procedure applies to 2.8 GHz and 3.0 GHz configurations of the Mac Pro (Early 2008). For the 
3.2 GHz configuration, see the procedure “Processors, 3.2 GHz.”
Note: The steps in this procedure illustrate how to remove the lower processor (CPU B). The 
instructions are the same for removing the upper processor (CPU A).
Important: Every time you remove a processor, you must replace the thermal grease on the...

Mac Pro (Early 2008) Take Apart — Processors, 2.8 and 3.0 GHz 88
Part Location
Procedure
Release the latch on the metal processor holder. 1. 
Note: You may want to use a flat-blade screwdriver to help release the latches.  

Mac Pro (Early 2008) Take Apart — Processors, 2.8 and 3.0 GHz 89
Rotate the top of the holder to the open position. 2. 
Lift the processor out of the holder.3.  

Mac Pro (Early 2008) Take Apart — Processors, 2.8 and 3.0 GHz 90
Important: When removing or installing a processor, always hold the processor by the edges. 
Be extremely careful not to touch the gold pins on the bottom of the processor, as this type of 
connector is very sensitive to contamination. Also be careful not to touch the gold pins in the 
processor socket on the logic board.
Note: You can identify the processor by the speed etched on the processor can, as illustrated 
below. You must clean off...