Apple mac pro 8x User Manual

Mac Pro (8x) Basics 11
Krytox Thermal Grease
To ensure a proper seal between the heatsink and processor, a bead of Krytox grease rims • 
the gasket on the underside of the heatsink. Replacement heatsinks come with the grease 
already applied. 
Use the following guidelines for when to reapply Krytox grease to the heatsink. (Refer to  • 
“Processor Heatsinks” in the Take Apart chapter for detailed instructions on how to apply or 
clean off the grease.)
In most cases, you do not need to reapply Krytox...

Mac Pro (8x) Basics 12
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, and heatsink gasket.) Pack this bag along with the failed module in the box that the 
replacement module came in, and return the box to Apple. 

© 2007 Apple Inc. All rights reserved.
 Service Source 
Take Apart
Mac Pro (8x) 

Mac Pro (8x) Take Apart — General Information 14
General Information
Orientation
For most take-apart procedures, it is recommended that you lay the computer on its side before 
removing or installing the part. For proper operation, however, Apple recommends that the 
unit be run in the upright position. The computer should never be operated on its side with the 
access panel facing down.
Tools
The following tools are required to service all configurations of the computer:
Long-handled magnetized Phillips...

Mac Pro (8x) Take Apart — General Information 15
Power Supply Fan
Fully removing the power supply is a preliminary step for removing the power supply fan. The 
simplified procedure for removing the power supply therefore simplifies removal of the power 
supply fan.
Processor Heatsink Cover
When removing the heatsink cover, you no longer have to make room by removing the memory 
cage screws and sliding the memory cage toward the back of the computer. The heatsink cover is 
held in place with tabs and...

Mac Pro (8x) — Opening the Computer 16
Opening the Computer
Tools
No tools are required for this procedure.
Preliminary Steps
Shut down the computer. 1. 
Warning: Always shut down the computer before opening it to avoid damaging its internal 
components or the components you are installing. Do not open the computer or attempt to 
install items inside it while it is on. 
Wait 5 to 10 minutes to allow the computer’s internal components to cool. 2.  
Warning: After you shut down the system, the internal...

Mac Pro (8x) — Opening the Computer 17
Procedure
Hold the side access panel and lift the latch on the back of the computer.  1. 
Warning: The edges of the access panel and the enclosure can be sharp. Be very careful 
when handling them.
Remove the access panel and place it on a flat surface covered by a soft, clean cloth. 2.  
Replacement Note: Make sure the latch is in the up position before replacing the access 
panel. If the latch is down, the access panel will not seat correctly in the enclosure.  

Mac Pro (8x) Take Apart — Hard Drives 18
Hard Drives 
The Mac Pro (8x) computer can accommodate four serial ATA (SATA) 3 Gbps hard drives in its four 
internal hard drive bays. In most configurations, a single hard drive occupies the far left bay  
(bay 1). 
The hard drives must meet the following specifications:
Type: SATA 3 Gbps• 
Width: 3.9 inches (102 mm)• 
Depth: 5.7 inches (147 mm)• 
Height: 1.0 inch • 
Tools
The only tool required for this procedure is a Phillips #1 screwdriver.
Preliminary Steps...

Mac Pro (8x) Take Apart — Hard Drives 19
Part Location
Procedure
Make sure the latch on the back panel is up, so that the drives and carriers are unlocked.1. 
Pull the hard drive out of the drive bay. 2.   

Mac Pro (8x) Take Apart — Hard Drives 20
If you are replacing the hard drive with a new drive, remove the four screws that mount the 3. 
drive to the carrier and mount the new drive in the carrier. 
Important: Hold the drive by its sides. Be careful not to touch the printed circuit board on 
the bottom of the drive. 
Replacement Note: Slide the carrier and drive over the guides and into the drive bay, until you 
feel the drive snap into place.
Note: If you install a new (replacement) drive, format it by...