Apple iMac G4 20-inch

The Apple iMac G4 20-inch arrived in November 2003 as the largest version of the articulated flat-panel design. Its 1680 x 1050 widescreen display, 1.25 GHz G4, GeForce FX graphics and SuperDrive made it the range’s premium configuration.

The larger screen required a heavier base and revised arm mechanism, making this a distinct physical model rather than a simple display option for the 17-inch system.

Notable Features

• A 20-inch 1680 x 1050 widescreen LCD, the largest panel fitted to the iMac G4.
• A revised arm and heavier base supported the larger display.
• Standard SuperDrive, USB 2.0 and GeForce FX 5200 Ultra graphics.

Historical Significance

• This was the final and most imposing expression of the original flat-panel iMac design.
• It remained on sale into 2004 before the all-in-display iMac G5 replaced the G4 family.

Collector’s Notes

• The display arm and LCD should be checked carefully because the large panel places additional load on the mechanism.
• Original speakers, keyboard, mouse and power cable help complete the system.

Specifications

Technical Information
Name	Apple iMac G4 20-inch
Manufacturer	Apple
Launched	Tuesday, November 18, 2003
Discontinued	July 2004
Country	United States
CPU	PowerPC 7455 G4 at 1.25 GHz
Units Sold
Operating System	Mac OS X 10.3 through Mac OS X 10.5.8
I/O	USB 2.0, FireWire, Ethernet, modem, audio, AirPort Extreme support and optional Bluetooth
Keyboard	Apple USB keyboard and mouse
Storage	80GB IDE hard disk and tray-loading SuperDrive
Sound	16-bit stereo sound with integrated speakers
Graphics	NVIDIA GeForce FX 5200 Ultra with 64MB VRAM
Display	Built-in 20-inch 1680 x 1050 widescreen active-matrix LCD on an articulated arm
ROM	New World ROM firmware
RAM	256MB; expandable to 1GB
CPU Speed	1.25 GHz