Power Mac G4 (Gigabit Ethernet) - Technical Specifications

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Power Mac G4 (Gigabit Ethernet) - Technical Specifications
Order no. M7891LL/A M7892LL/A M7893LL/A
Processor 400–MHz PowerPC G4 Dual 450–MHz PowerPC G4 Dual 500–MHz PowerPC G4
Backside level 2 cache 1MB 1MB per processor 1MB per processor
Memory (PC100 SDRAM) 64MB 128MB 256MB
Hard disk drive3 20GB (5400 rpm) 30GB (7200 rpm) 40GB (7200 rpm)
Graphics support 16MB SDRAM 16MB SDRAM 16MB SDRAM
Optical drive DVD–ROM (tray) DVD–ROM (tray) DVD–RAM (tray)
FireWire Two 400–Mbps ports Two 400–Mbps ports Two 400–Mbps ports
USB Two ports
(12 Mbps each)
Two ports
(12 Mbps each)
Two ports
(12 Mbps each)
Ethernet 10/100/1000BASE–T 10/100/1000BASE–T 10/100/1000BASE–T
Wireless networking2 AirPort ready AirPort ready AirPort ready
Modem456K V.90 56K V.90 56K V.90
All models also include Apple Pro Keyboard, Apple Pro Mouse, FireWire camcorder cable; Mac OS 9, QuickTime, iMovie 2, Microsoft Internet Explorer, Netscape Communicator, FAXstf, and Palm Desktop; complete setup, learning, and reference documentation; and limited warranty. Also includes 30 days of free Internet service through EarthLink.
Product contains electronic documentation. Backup software provided on CD–ROM.
Build to Order Options
Processor Memory Hard Disk Drives3 Optical Drives Other Options
400 MHz 64MB 20GB Ultra ATA/66 (5400 rpm) DVD–ROM ATI RAGE 128 PCI card
Dual 450 MHz 128MB 30GB Ultra ATA/66 (7200 rpm) DVD–RAM SCSI PCI card
Dual 500 MHz 256MB 40GB Ultra ATA/66 (7200 rpm)   Zip drive
  384MB 36GB Ultra160 SCSI (10K rpm)*   AirPort Card
  512MB 72GB Ultra160 SCSI (10K rpm)*   AirPort Base Station
* SoftRAID included with purchase of multiple Ultra160 SCSI hard disk drives.
Technical Specifications


  • 400–MHz, dual 450–MHz, or dual 500–MHz PowerPC G4 processor(s)
  • Velocity Engine vector processing unit with 162 integrated SIMD instructions
  • Full 128–bit internal memory data paths
  • Powerful floating–point unit supporting single–cycle, double–precision calculations
  • Data stream prefetching operations supporting four simultaneous 32–bit data streams
  • 1MB backside level 2 cache per processor
  • 100–MHz system bus supporting up to 800–MBps data throughput


  • 64MB, 128MB, or 256MB of PC100 SDRAM (3.3–volt, unbuffered, 64–bit–wide, 168–pin, running at 100 MHz)
  • Four DIMM slots support up to 1.5GB of PC100 SDRAM (999MB maximum per application in Mac OS 9) using the following DIMMs:
    —64MB or 128MB DIMMs (64–bit–wide, 64–Mbit technology) —128MB or 256MB DIMMs (64–bit–wide, 128–Mbit technology)
    —512MB DIMMs (64–bit–wide, 256–Mbit technology)


  • One of the following hard disk drives:
    —20GB 5400–rpm Ultra ATA/66 hard disk
    —20GB 7200–rpm Ultra ATA/66 hard disk
    —40GB 7200–rpm Ultra ATA/66 hard disk
  • One of the following optical drives:
    —DVD–ROM drive for playing DVD movies and CDs
    —DVD–RAM drive for playing DVD movies and CDs, and writing to DVD–RAM discs (up to 9.4GB per disc)
  • Three 3.5–inch hard disk drive expansion bays:
    —One ATA drive preinstalled in standard configurations
    —Support for up to two internal ATA drives 
    —Support for up to three internal SCSI drives

Graphics Support

  • ATI RAGE 128 Pro graphics card with 16MB of SDRAM graphics memory installed in a dedicated AGP 2X graphics slot
  • Support for up to 1920– by 1200–pixel resolution at 32 bits per pixel (millions of colors)
  • Apple Display Connector (ADC); carries analog and digital video, USB, and power
  • 15–pin mini D–Sub VGA connector


  • 10/100/1000BASE–T Ethernet connector (RJ–45)
  • Built–in 56K V.90 modem card4
  • Optional 11–Mbps AirPort Card; IEEE 802.11 DSSS compliant2
  • Optional AirPort Base Station containing 56K modem and 10BASE–T Ethernet port2

Peripheral connections

  • Two 400–Mbps FireWire ports; includes one 4–pin–to–6–pin FireWire cable for connecting DV camcorder
  • Two USB ports (12 Mbps each)


  • Three full–length 64–bit, 33–MHz PCI slots
  • One AGP 2X slot with graphics card installed

Keyboard and mouse

  • Apple Pro Keyboard with full–size function and navigation keys, audio controls, and media–eject key
  • Apple Pro Mouse with optical sensor for precision cursor control


  • One input and one output analog minijack supporting 16–bit stereo audio; 44.1–kHz sampling rate
  • Built–in speaker
  • Support for external third–party FireWire and USB digital audio peripherals such as microphones, speakers, and MIDI devices

Electrical requirements and agency approvals

  • Line voltage: 115V AC (90V to 132V AC) or 230V AC (180V to 264V AC)
  • Frequency: 47 to 63 Hz, single phase
  • Maximum continuous power: 220W
  • EPA ENERGY STAR compliant

Environmental requirements

  • Operating temperature: 50° to 95° F (10° to 35° C)
  • Storage temperature: –40° to 116° F (–40° to 47° C)
  • Relative humidity: 5% to 95% noncondensing
  • Altitude: 0 to 10,000 feet (3,048 m)

Size and weight

  • Height: 17.0 inches (43.2 cm)
  • Width: 8.9 inches (22.6 cm)
  • Depth: 18.4 inches (46.7 cm)
  • Weight: 30.0 pounds (13.6 kg)5
  1. 999MB maximum per application in Mac OS 9.
  2. Wireless Internet access requires AirPort Base Station and Internet access (fees may apply). Some ISPs are not currently compatible with AirPort, including America Online. Range may vary with site conditions.
  3. For hard drive capacity measurements, 1GB = 1 billion bytes; actual formatted capacity less.
  4. Actual modem speeds lower; speed depends on connection rate and other factors.
  5. Weight varies depending on configuration.

Published Date: Apr 6, 2016