Apple power mac g5 late 2004 User Manual

							
 © 2004 Apple Computer, Inc. All rights reserved. 

 
 
 
Service Source
 
Power Mac G5 (Late 2004)
  Updated: 18 November 2005 
						

							
 

© 2004 Apple Computer, Inc. All rights reserved.
 

 
 
 
Service SourceBasics
 
                  
 
Power Mac G5 (Late 2004) 
						

							
 

Power Mac G5 (Late 2004) Basics - 
 
1
 
 Overview
 
Overview
 
Power Mac G5 (Late 2004) is a single-processor 1.8 GHz Power Mac G5 computer that 
complements the existing family of dual 2.5 GHz, dual 2.0 GHz, and dual 1.8 GHz Power 
Mac G5 models.
Like the other Power Mac G5 models, the Power Mac G5 (Late 2004) computer is 
powered by the a 64-bit PowerPC G5 processor. It features 6.4GB per second of fast 
memory bandwidth, up to 4 GB of total main memory, three PCI expansion slots, up to 500 
GB of internal Serial ATA mass storage, and AGP 8X Pro graphics capabilities. 
						

							
 

Power Mac G5 (Late 2004) Basics - 
 
2
 
 Identification
 
Identification
 
To identify a particular model of Power Mac G5, check the computer’s serial number, 
which lists the model’s configuration. The serial number is located directly below the air 
de flector inside the side access panel.
The Power Mac G5 (Late 2004) computer is also distinguised from earlier Power Mac G5 
models by the physical differences noted in the graphic below. 
						

							
 

Power Mac G5 (Late 2004) Basics - 
 
3
 
 What’s New
 
What’s New
 
Overview
 
Microprocessor:
 
 The Power Mac G5 (Late 2004) computer has a single 1.8 GHz 
PowerPC G5 processor. 
 
Processor system bus:
 
 The processor interface system bus runs at one-third the speed 
of the system processor. 
 
Memory bus:
 
 The main memory bus is 128 bit 400 MHz. 
 
System management unit:
 
 Power Mac G5 (Late 2004) uses an advanced system 
management unit (SMU) to manage thermal and wattage conditions, while keeping 
acoustic noise to a minimum. The SMU replaces the PMU of previous Power Mac G5 
models.
 
DDR SDRAM:
 
 The computer has four DIMM slots for 184 pin DIMMs (dual inline memory 
modules) using unbuffered DDR (double data rate) SDRAM 64-bit, 400 MHz (PC3200) 
devices for a maximum of 4 GB. 
 
Graphics card:
 
 The computer comes standard with the Nvidia GeForce Fx 5200 Ultra 
with 64 MB RAM. Available as con figure-to-order (CTO) options are the ATI Radeon 9800 
XT with 256 MB RAM, the ATI Radeon 9600 XT with 128 MB RAM, the Nvidia GeForce 
6800 GT DDL with 256 MB RAM, and the Nvidia GeForce 6800 Ultra DDL with 256 MB 
RAM.
 
PCI expansion slots:
 
 The computer includes three 64-bit, 33 MHz PCI slots. PCI-X cards 
are not supported.
 
Hard drives:
 
 An internal 7200 rpm Serial ATA (SATA) hard drive occupies one of two drive 
bays and functions as the default boot drive. A second SATA drive is available as a CTO 
option. Power Mac G5 (Late 2004) comes standard with an 80 GB SATA hard drive, and 
160 GB and 250 GB SATA drives are available as CTO options. 
						

							
 

Power Mac G5 (Late 2004) Basics - 
 
4
 
 What’s New
 
PowerPC G5 Processor
 
The processor used in the Power Mac G5 (Late 2004) has the following features:
• Single 1.8 GHZ processor
• 64-bit PowerPC implementation with 42-bit physical memory addressing
• Core runs at three times the bus speed 
• Superscalar execution core supporting more than 200 in-flight instructio\
ns
• Two independent double-precision floating point units 
• Velocity Engine: 128-bit-wide vector execution unit 
• 64K L1 instruction cache, 32K L1 data cache per processor
• Built-in 512 KB backside L2 cache per processor
• Two independent, unidirectional 600 MHz frontside buses supporting 4.8 G\
Bps data throughput
 
System Management Unit (SMU)
 
The advanced system management unit of the Power Mac G5 (Late 2004) employs 
advanced thermal and wattage management to keep acoustic noise of the fans to a 
minimum. The enclosure is divided into discrete zones, each with independently controlled 
fans bringing in cool air from the front of the enclosure, directing it over system 
components and exhausting it out the rear. Temperature and power consumption are 
monitored by the operating system, which communicates with the SMU, which in turn 
controls and monitors fan operation. Note that if Mac OS X is not booted, thermal 
management must be provided by the alternate development operating system.
The SMU monitors the wattage from 0 to 100 W. The fan speeds are increased 
proportionally, where 100 W operates the fans at highest speed. The wattage calculation 
does not include the 25 V ADC power output.  
						

							
 

Power Mac G5 (Late 2004) Basics - 
 
5
 
 What’s New
 
DDR Memory
 
In the Power Mac G5 (Late 2004) computer, PC3200/400 DDR-SDRAM DIMMs must be 
installed in pairs of equal size and speed. Memory from older Macintosh computers is not 
compatible. Do not try to install non-DDR memory as it will not fit in the DIMM slots and 
could cause damage.
The computers ship with a minimum of 256 MB of RAM, provided by a pair of 128 MB 
DIMMs installed in the two DIMM slots marked “1.” You can add DIMMs, provided they are 
installed as a pair of equal size, in the two DIMM slots marked “2.” A diagram on the logic 
board near the DIMM slots illustrates how the pairs must be installed. 
 
Graphics Cards
 
The standard Power Mac G5 (Late 2004) computer comes with an Nvidia GeForce FX 
5200 Ultra graphics card installed. The supported graphics cards are shown below: 
The CTO  ATI Radeon 9800 XT, Nvidia GeForce 6800 GT DDL, and Nvidia GeForce 6800 
Ultra DDL cards occupy both the AGP slot and the adjacent PCI slot. For this reason, the 
number of available PCI slots is reduced from three to two.
 
Graphics Card Video SDRAMConnectors
 
Nvidia GeForce FX 5200 Ultra 64 MB DDR ADC and DVI
ATI Radeon 9600 XT (CTO) 128 MB DDR ADC and DVI
ATI Radeon 9800 XT (CTO) 256 MB DDR ADC and DVI
Nvidia GeForce 6800 GT DDL (CTO) 256 MB DDR
 
Two dual-link DVIs
 
Nvidia GeForce 6800 Ultra DDL (CTO) 256 MB DDR
 
Two dual-link DVIs 
						

							
 

Power Mac G5 (Late 2004) Basics - 
 
6
 
 What’s NewAll graphics cards support dual displays in either extended desktop or video mirroring 
mode, and support digital resolutions up to 1920x1200 pixels and analog resolutions up to 
1600x1200 pixels. The Nvidia GeForce 6800 graphics cards support resolutions up to 
2560 by 1600 pixels.
The display memory on the AGP card is separate from the main memory. The display 
memory consists of 64 MB (or 128 MB and 256 MB CTO) of DDR devices con
figured to 
make a 128-bit data bus. The display memory cannot be expanded by the user. 
 
Ports
 
The following ports are included on the front and back panels of Power Mac G5 (Late 
2004). The ports are the same as on the original Power Mac G5 computer. 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 
• Modem port 
						

							
 

© 2004 Apple Computer, Inc. All rights reserved.
 

 
 
 
Service SourceTake Apart
 
                  Power Mac G5 (Late 2004) 
						

							
 

Power Mac G5 (Late 2004) Take Apart - 
 
1
 
 General Information
 
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:
• Magnetic Phillips screwdriver
• Flat-blade screwdriver
• Jeweler’s flat-blade screwdriver
• Needlenose pliers
• Small wire cutter
• Mat knife or Xacto knife (to remove locking rivet on heatsink cover)
• Cup hook (to remove locking rivet)
• Small wooden stick (to remove locking rivet)
• Small mirror (for seeing small boards inside the enclosure)
• Soft cloth (to protect removed parts from scratches)
 
Parts Requiring Enclosure Replacement
 
The following are not separate, orderable parts. To replace them, you must replace the 
enclosure.
• Media fan
• Hard drive locking latches
• Hard drive bay
• Optical drive levers
• Media shelf
• Power harness cable, including hard drive power cables
• Air deflector sensor cable
• Media bay sensor cable
• Rear panel latch