Apple power mac g5 late 2005 User Manual

							
Power Mac G5 (Late 2005) Repair Extension Program for Power Supply Issues 11
Apple will charge service accounts for any parts ordered for repairs involving units eligible for 
the Power Mac G5 (Late 2005) REP that are not related to this program and are not covered by 
warranty or an extended AppleCare service agreement.
Reimbursement Strategy
Apple is aware that some customers may have paid for out-of-warranty repairs that now qualify 
under this program. If a customers’ Power Mac G5 (Late 2005) computer was repaired out of 
warranty and he/she believes the repair qualified under the Power Mac G5 (Late 2005) REP for 
Power Supply Issues, Apple will review the claim and determine if the customer qualifies for 
reimbursement of the repair cost.
If the claim is determined to be eligible for repair under the Power Mac G5 (Late 2005) REP, Apple 
will reimburse your customer directly.  
Apple will work with service providers to inform affected customers (where contact information 
is available) about details on the reimbursement process. If your service location has conducted 
any out-of-warranty repairs that are eligible under this program, Apple will contact you in the 
near future to coordinate communications to affected customers.
Note: Service that was performed to repair damage caused by accident or misuse is not covered 
under this program. 
						

							
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© 2005 Apple Computer, Inc. All rights reserved.
Basics
Power Mac G5 (Late 2005) 
						

							
Power Mac G5 (Late 2005) Basics 13
Overview
Power Mac G5 (Late 2005) is the third generation of Power Mac G5 computers. It leverages the G5 
architecture with the following new features:
G5 dual core processor (two processors on one chip): The Power Mac G5 (Late 2005 Dual 
2.0 GHz/2.3 GHz) models use a single dual-core PowerPC G5 processor for dual processor 
function. The Power Mac G5 (Late 2005 Quad 2.5 GHz) model uses two dual-core PowerPC 
G5 processors for quad processor power.
533 MHz DDR2 main memory
PCI Express 16x video support
PCI Express 4x and 8x expansion support
Two enhanced 1GB Ethernet ports (supporting jumbo frames) on the back panel
Three USB 2.0 ports on the back panel
Combination Airport Extreme/Bluetooth card (CTO option)
External Apple USB modem (CTO option)
Diagnostic LEDs on logic board
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Power Mac G5 (Late 2005) Basics 14
Differentiating the Power Mac G5 (Late 2005)
While Power Mac G5 (Late 2005) computers look similar to earlier Power Mac G5 models, you can 
easily differentiate the Power Mac G5 (Late 2005) by checking the back panel. Power Mac G5 (Late 
2005) computers include two Gigabit Ethernet ports and three USB 2.0 ports, as illustrated below. 
Gigabit Ethernet Ports (2)
USB 2.0 Ports (3)
Power Mac G5 (Late 2005)
Earlier models include just one Gigabit Ethernet port and two USB 2.0 ports.
USB 2.0 Ports (2)
Gigabit Ethernet Port
Earlier Power Mac G5 Models 
						

							
Power Mac G5 (Late 2005) Basics 15
Gotchas
Although the Power Mac G5 (Late 2005) computer looks similar to earlier Power Mac G5 models, 
there are a number of significant service and support differences. Before troubleshooting or 
servicing a Power Mac G5 (Late 2005), make sure you are familiar with the following points. 
DDR2 memory: The Power Mac G5 (Late 2005) computer uses both ECC and NECC DDR2 DIMMs. 
Refer to “DDR2 Memory” in the Troubleshooting chapter for more information about identifying 
and installing these DIMMs.
PCI Express expansion slots: The Power Mac G5 (Late 2005) contains four PCI Express expansion 
slots for graphics and other expansion cards. Refer to “PCI Express Cards” in the Troubleshooting 
chapter for more information.
Graphics cards: Note the following differences in Power Mac G5 (Late 2005) graphics cards:
Because Power Mac G5 (Late 2005) logic boards use PCI Express technology for all expansion 
slots, AGP graphics cards and all earlier PCI cards are not compatible with these computers. 
Graphics cards for the Power Mac G5 (Late 2005) have two DVI connectors. 
Some cards ship with an adapter for connecting two DVI monitors. 
The NVIDIA Quadro FX 4500 graphics card requires a new internal booster power cable. Refer 
to the NVIDIA Quadro FX 4500 card take-apart procedure.
Special tools: Three special tools are required for servicing the Power Mac G5 (Late 2004) 
computer. Refer to “Special Tools” in the Take Apart chapter.
Power cord: Because the power cord for the Power Mac G5 (Late 2005) is a special heavy-duty 
cord specific to this model, power cords from earlier Power Mac G5 models are not compatible. 
You can order the Power Mac G5 (Late 2005) power cord from GSX. For more information, refer to 
“Power Cord” in the Take Apart chapter.
Diagnostic LEDs: To aid in troubleshooting the Power Mac G5 (Late 2005), a set of diagnostic 
LEDs has been added to the Power Mac G5 (Late 2005) logic board. Refer to “Diagnostic LEDs” in 
the Troubleshooting chapter for instructions on how to locate and interpret the LEDs.
Power supply verification: The Power Mac G5 (Late 2005) computer uses a new method of 
power supply verification. Refer to “Power Supply Verification” in the Troubleshooting chapter.
AirPort Extreme/Bluetooth combo card: The separate AirPort Extreme and Bluetooth cards 
used in earlier Power Mac G5 models have been replaced by a single AirPort Extreme/Bluetooth 
combination card in the Power Mac G5 (Late 2005). The earlier cards are not compatible with 
the Power Mac G5 (Late 2005). For more information, refer to “AirPort Extreme/Bluetooth 
Combination Card” in the Take Apart chapter and Knowledge Base article 302721.
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Power Mac G5 (Late 2005) Basics 1
No external antenna: There is no external AirPort Extreme/Bluetooth antenna on the Power Mac 
G5 (Late 2005) computer. The antenna board requires an entirely new take apart procedure.
Modem: There is no internal modem available for the Power Mac G5 (Late 2005) computer. 
Instead, Apple offers a CTO option for an external USB modem.
Processor support bar: A support bar has been added under the processor/heatsink on all 
configurations of the Power Mac G5 (Late 2005).
Processor screws: The mounting screws for the Power Mac G5 (Late 2005) processors must be 
removed and replaced in a different order from the screws on earlier Power Mac G5 processors. 
Refer to the Take Apart procedures for the Dual processors and Quad processor. Note that there 
is a specific order both for removing and for replacing the screws on the Quad processor.
Media bay fan: It is possible to replace the media bay fan on the Power Mac G5 (Late 2005) 
computer. The fan could not be replaced on earlier Power Mac G5 models. 
Other new take-apart procedures: Pay special attention to differences from earlier models in 
the take-apart procedures and warnings for the following modules:
Logic board
Power supply
Front panel board
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Power Mac G5 (Late 2005) Basics 1
Serial Number Location
To identify a particular Power Mac G5 (Late 2005) computer, check the computer’s serial number, 
which lists the model’s configuration. The serial number is located directly below the air deflector 
inside the side access panel. 
						

							
Power Mac G5 (Late 2005) Basics 1
Liquid Cooling System (LCS)
The Power Mac G5 (Late 2005 Quad) configuration uses a liquid cooling system (LCS) to manage 
the temperature in the computer. The liquid cooling system is sealed and is designed to be 
opened only by an Apple Authorized Service Provider (AASP). To ensure proper safety and 
handling of the LCS system, please read the following information.
General Safety Information
The LCS cooling system fluid is predominantly water (80% or greater) with a mixture of corrosion 
inhibitors and bacterial growth preventatives. In normal use in a non-leaking LCS there are no 
special handling considerations. However, if a leak in the system is suspected or discovered and 
the computer is plugged in, remove power to the computer by pulling the power plug.
Nitrile or rubber glove should be worn when handling an LCS module that is leaking or 
suspected to be leaking. Evidence of leaks would include corrosion around fittings in the LCS 
coolant system, a liquid present, or a slick or slimy feel when handling the part. For leaks or spills, 
wipe up the fluid using rags, paper towels, or other suitable materials. Dispose of all cleaning 
materials according to local laws and regulations Do not combine used coolant with any other 
chemical.
When returning a failed LCS module to Apple, place the module (leaking or not) in the packaging 
that the replacement module came in. Follow the packaging instructions included with the 
replacement module. Failure to follow the instructions could damage the equipment and void 
warranty coverage.
Safety Guidelines
Below is a summary of first aid measures for exposure to the liquid. For complete instructions 
refer to the Material Safety Data Sheets (MSDS) for the liquid. The Safety Data Sheets can be 
found at http://www.apple.com/environment/resources/msds.html.
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 running water. Remove contaminated clothing. The recommended 
flushing is 15 minutes if pain or irritation occurs. Seek medical attention if irritation or 
redness develops.
Ingestion: Ingestion of this product, while unlikely to occur in its containment, may cause 
irritation of the mouth and throat, gastric upset, stomach ache, cramps, nausea and vomiting.  
						

							
Power Mac G5 (Late 2005) Basics 1
If the product is swallowed, CALL PHYSICIAN OR POISON CONTROL CENTER FOR MOST 
CURRENT INFORMATION. If professional advice is not available, do not induce vomiting. 
Contaminated individuals should drink milk, egg whites, or large quantities of water. Never 
induce vomiting or give diluents (milk or water) to someone who is unconscious, having 
convulsions, or unable to swallow. 
						

							
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© 2005 Apple Computer, Inc. All rights reserved.
Take Apart
Power Mac G5 (Late 2005)