Apple power mac g5 june 2004 User Manual

14 Power Mac G5 Basics

Features
Overview
PowerPC G5 — The Power Mac G5 computer incudes the new 64-bit PowerPC G5 processor 
running at 1.6, 1.8, 2.0, 2.3, 2.5, or 2.7 GHz, well beyond the speeds of G4 processors. 
Serial ATA hard drives — Unlike older parallel drives, the new serial ATA drives in the Power Mac 
G5 offer up to 150 MB/s data throughput. The 7200 rpm drives come in 80, 160, 250, or 400 GB 
capacity.
PCI-X slots — Higher-bandwidth PCI slots allow for greater amounts of data when using...

Power Mac G5 Basics 15
GHz) models feature a liquid cooling system that is more efficient than a traditional heat sink. 
This system provides a continuous flow of thermally conductive fluid that transfers heat from the 
processors. The heated fluid then flows through a radiant grille, where air passing over cooling 
fins returns the fluid to its original temperature.
DDR Memory
Depending on the model, Power Mac G5 computers have either four or eight Dual Inline Memory 
Module (DIMM) slots for...

16 Power Mac G5 Basics

Video
The Power Mac G5 computer comes with a graphics card installed in the AGP slot. All graphics 
cards support dual displays in either extended desktop or video mirroring mode.
The display memory on the AGP card is separate from the main memory. The display memory 
consists of 64, 128, or 256 MB of DDR video SDRAM. The display memory cannot be expanded by 
the user.
The following table lists the standard and CTO graphics cards used in Power Mac G5 computers. 
(Port 1 indicates...

Power Mac G5 Basics 17

Fan Controller
The Power Mac G5 system employs advanced thermal management to keep acoustic noise to 
a minimum. The system is divided into discrete zones, each with independently controlled fans 
bringing in cool air from the front of the enclosure, directing it through ducts and exhausting it 
out the rear. Temperature and power consumption are monitored by the operating system, which 
communicates with the Fan Control Unit, which in turn controls and monitors fan operation....

18 Power Mac G5 Basics
Ports
The following ports are included on the front and back panels of the Power Mac G5. For 
illustrations of the port locations, see the “External Views” topic in the Views chapter.
Front
Power button 
Headphone port 
USB 2.0 port 
FireWire 400 port 
Rear
AirPort antenna port
Bluetooth antenna port 
Optical audio-out port
Optical audio-in port
Audio line-out port 
Audio line-in port 
USB 2.0 ports (two ports)
FireWire 400 port 
FireWire 800 port 
10/100/1000Base-T Ethernet port...

 Service Source
© 2005 Apple Computer, Inc. All rights reserved.
Take Apart
Power Mac G5 

Power Mac G5 Take Apart 21

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 the computer:
Long-handled magnetic Phillips screwdriver (10-inch shaft)
Short-handled...

22 Power Mac G5 Take Apart
Take Apart Procedures
This manual covers several different Power Mac G5 models. Some models may look slightly 
different from the one shown in the illustrations; however, except where indicated, the following 
procedures apply to all models. 

Power Mac G5 Take Apart 23

Opening the Computer
Tools
No tools are required for this procedure.
Preliminary Steps
Shut down the computer. 
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. 
Warning: After you shut down the system, the internal components can be...

24 Power Mac G5 Take Apart

Procedure
Hold the side access panel and lift the latch on the back of the computer.  
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. 
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.
1.
2.