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 grease when installing a new  -
processor or when transferring processors and heatsinks to a replacement logic board. 
If you are installing a new heatsink , remove any residual grease from the outer edges  -
of the processor. Do not apply new grease to the heatsink or processor, as the heatsink 
comes with the full capacity of grease applied.
For more detailed information, refer to “Processor Heatsinks” and “Processors” in the Take Apart 
chapter.
Safety and First Aid Guidelines
Below is a summary of safety and first aid measures for exposure to the coating on the processor 
heatsink and processor or the Krytox grease used in sealing the processor heatsink to the 
processor. For complete instructions, refer to the specific Material Safety Data Sheets (MSDS) 
included with the replacement parts.
Safety
Avoid contact with eyes.
Avoid contact with skin.
Wash thoroughly after handling.
Do not store or consume food, drink, or tobacco in areas where they may become 
contaminated with the material.
First Aid
Eyes: Immediately flush with plenty of water. If wearing contact lenses, after initial flushing, 
remove contact lenses and continue to flush for 15 minutes. Have eyes examined by a 
medical professional if irritation persists.
Skin: Wash skin with soap and running water. The recommended flushing is 15 minutes if 
pain or irritation occurs. Remove and wash contaminated clothing. Seek medical attention if 
irritation or redness develops.
Inhalation: Remove to fresh air. If not breathing, give artificial respiration. If breathing is 
difficult, give oxygen. Call a physician.
Ingestion: Do not induce vomiting. Contaminated individual should immediately be given 
two glasses of water. Never give anything by mouth to someone who is unconscious, having 
convulsions, or unable to swallow. Call a physician. 
						

							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 #1 screwdriver• 
Long-handled magnetized 3 mm flathead hex screwdriver• 
Short-handled, magnetized 2.5 mm hex wrench• 
Flat-blade screwdriver• 
Magnetized jewelers Phillips #1 screwdriver • 
Magnetized jeweler’s Phillips #0 screwdriver• 
Jeweler’s flat-blade screwdriver• 
Needlenose pliers• 
Scissors or wire cutters• 
Xacto knife• 
Nylon probe tool (black stick)• 
Thermal grease kit (Apple part number 076-1258)• 
Tape (for temporarily holding cables out of the way)• 
Small mirror (for seeing small boards inside the enclosure)• 
Soft cloth (for protecting the enclosure from scratches)• 
Differences Between the Original Mac Pro and  
Mac Pro (8x) 
The following are differences in the take-apart procedures for the Mac Pro (8x), as compared with 
earlier Mac Pro configurations. (For detailed information, be sure to refer to the full procedure for 
each part.)
Power Supply
The power supply cables are located under a cover at the back wall of the optical drive bay. This 
change simplifies access to the cable connectors and makes removal of the power supply easier. 
						

							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 magnets and comes off easily without any tools.
Front Fan Assembly
The front fan assembly is held in place by two screws: one at the top rear of the assembly that 
mounts the assembly to the logic board and a new screw at the bottom front of the assembly. 
Once these screws are removed, the front fan assembly can easily be lifted out of the enclosure.
Memory Cage with Rear Fan
The only parts that must be removed before removing the memory cage are the top and bottom 
memory cards, any PCI Express card installed in slot 1, and the processor heatsink cover. The rear 
fan collapses into the cage, which simplifies removal of the cage and fan. In addition, the rear fan 
can be removed from the memory cage and is therefore a separate, orderable part.
Processor Heatsinks and Processors
A special coating that helps manage the temperature of the computer comes applied to the 
underside of the heatsink and the top of the processor. As a result, several new guidelines are 
necessary for handling the heatsink and processor. 
Logic Board
Eleven screws secure the logic board to the enclosure. Previous Mac Pro configurations used 
eight screws.
Bluetooth Antenna Board and Cable
Because the Bluetooth antenna board cable runs under the logic board, you must remove the 
logic board before removing the antenna board and cable.
Parts Requiring Enclosure Replacement
The following are not separate, orderable parts. To replace them, you must replace the enclosure.
Media shelf• 
Rear panel latch•  
						

							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 components can be very hot. You 
must let the computer cool down before continuing.
Unplug all external cables from the computer except the power cord.3. 
Touch the metal PCI access covers on the back of the computer to discharge any static 4. 
electricity from your body. 
Important: Always discharge static before you touch any parts or install any components 
inside the computer. To avoid generating static electricity, do not walk around the room until 
you have finished working and closed the computer.
Unplug the power cord. 5. 
Warning: To avoid damaging its internal components or the components you want to  
install, always unplug the computer before attempting any take-apart procedure. 
Put on an ESD wrist strap.6.  
						

							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
Before you begin, open the computer, and lay it on its side with the access side facing up.
Important: Make sure the latch on the back panel is in the up position. When the latch is down, 
the hard drives and carriers are locked in place and you will not be able to remove them. 
						

							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 following these steps:
Open Disk Utility and select the drive in the list to the left. 1. 
Note: If you are formatting the primary drive, use the Disk Utility program on the Install Disk.
Click on the Partition tab.2.  
Click on “Options” and verify GUID is selected if this is a bootable drive.3. 
Apply the change by clicking on the “Partition” button.4.