iMac G5

Introduced: August 2004
Terminated: May 2005


The first iMac with a G5 processor, the iMac G5 had a new case.  Everything was now contained in a two-inch thick case that also housed the flat-panel monitor.  It was available in three configurations.  The low-end configuration had a 17” LCD, ran at 1.6Ghz, had an 80Gb hard drive and a Combo drive.  The midrange configuration had a 17” LCD, ran at 1.8Ghz, had an 80Gb hard drive and a SuperDrive.  The high-end configuration had a 20” LCD, ran at 1.8Ghz, had a 160Gb hard drive and a SuperDrive.


The iMac G4 took its design cues from the Apple Cinema display line and managed to house the entire computer in a very small space.  Additionally, it was a much faster computer than the iMac G4 before it and offered features like a faster memory bus and a new audio port that could act as an optical digital audio output. 


iMac G5


Processor: PowerPC 970 v2.2 (G5)
Number of Cores: 1
Processor Speed: 1.6, 1.8, dual 1.8, or dual 2.0 GHz
Benchmarks: 1.6 GHz: 988, 1.8 GHz: 1127, dual 1.8 GHz: 1592, dual 2.0 GHz: 1671
Cache: 64 KB (instruction), 32 KB (data) L1, 512 KB L2
System Bus: 800, 900, dual 900 MHz, or dual 1.0 GHz
Hard Drive: 80, 160, or 250 GB 7200-rpm
Media: 4x/8x/16x/8x/32x DVD-R/CD-RW (4x SuperDrive)
Peripherals: Apple Keyboard, Apple Mouse
Weight and Dimensions (US): 39.2 lbs., 20.1” H x 8.1” W x 18.7” D
Weight and Dimensions (Metric): 17.8 kg, 51.1 cm H x 20.6 cm W x 47.5 cm D
Original Mac OS: Mac OS X 10.2.7 (G5) (6S80) or 10.3 (dual 1.8 GHz)
Later Mac OS: Mac OS X 10.3
Maximum Mac OS: Latest release of Mac OS X
Hardware Test: AHT (Power Mac) 2.1, 2.2.5, 2.5, 2.5.2
Firmware: Open Firmware
Firmware Update: Power Mac G5 Firmware Update 5.1.4
Firmware Update URL:
Logicboard RAM: None
Maximum RAM: 4.0 GB (1.6 GHz) or 8.0 GB (1.8 GHz+)

Type of RAM Slots: 4 - PC2700 (1.6 GHz), or 8 - PC3200 (1.8 GHz+) 2.5v, unbuffered, 8-byte, nonparity 184-pin DDR SDRAM (matched pairs)
Minimum RAM Speed:—
Interleaving Support: Yes
Graphics Card: NVIDIA GeForceFX 5200 Ultra, GeForce 6800 Ultra DDL, ATI Radeon 9600 Pro, or Radeon 9800 Pro
ATI Card Model: ATY,RV350 (9600 Pro), ATY,R350 (9800 Pro)
Graphics Memory: 64 (GeForceFX or Radeon 9600 Pro) or 128 MB (Radeon 9800 Pro) or 256 MB (6800)
Built-in Display: None
Display Modes: Dual display extended and video mirroring
Display Connection: 1 - ADC, 1 - DVI (5200, 9600, 9800) or 2 - dual-link DVI (6800)
Expansion Slots: 3 - PCI (1.6 GHz) 3 - PCI-X (1.8 GHz+), 1 - 8x AGP Pro
Expansion Bays: 2 - Internal 3.5” Serial ATA drive bays, 1 - optical drive bay
Hard Drive Bus: 2 - 1.5 Gbps Serial ATA (SATA) controllers
Large Drive Support: Yes (128 GB or larger per drive)
Optical Drive Bus: Ultra ATA/100
Backup Battery: 3.6 V 850 mAh Lithium (922-4028)
Max Watts: 420 W (1.6), 430 W (1.8), 604 W (Dual 1.8/2.0 GHz)
Line Voltage: 100–125V AC or 200–240V AC
Liquid Cooling: None
AirPort: Optional AirPort Extreme card (802.11b/g) (external antenna)
Bluetooth: Optional Bluetooth 1.1
Ethernet: 10/100/1000BASE-T (RJ-45)
Modem: 56k v92
ADB: None
Serial: None
SCSI: None
USB: 3 - 480Mbps
FireWire: 2 - 400 MBit/s, 1 - 800 MBit/s (15W total power)
Audio In: 1 - 3.5-mm analog input jack, 1 - optical S/PDIF (Toslink) input (24-bit 44.1 kHz sample rate)

Audio Out: 2 - 3.5-mm analog output jacks, 1 - optical S/PDIF (Toslink) output, 1 - Built-in speaker (24-bit 44.1 kHz sample rate)


Introduced in August 2004, the iMac G5 was discontinued in May 2005 to make way for new models.



  • Might want to update this page. It’s pretty much out of whack.

    - Picture is of a Power Mac.
    - “History - The iMac G4 took its design cues from the Apple Cinema display line”. That would be the iMac G5.
    - All the specs are for the Power Mac, not the iMacG5.

    Chris CA had this to say on Jul 01, 2008 Posts: 2
  • When you need performance for things like playing 3D games, editing HD video, or running design software, the discrete AMD Radeon HD graphics in iMac go to work. You see more frames per second and experience better responsiveness. With the AMD Radeon HD 6970M, the top-of-the-line 27-inch iMac offers the best graphics of any all-in-one. But no matter which iMac you choose, you’re guaranteed superior graphics performance.-Jonathan Berkowitz

    Ana had this to say on Aug 24, 2011 Posts: 76
  • Alpina had this to say on Nov 18, 2011 Posts: 154
  • Page 1 of 1 pages
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