The PowerMac G3

Codename: Gossamer
CPU: PowerPC 750
CPU speed: 233/266/300/333 Mhz
FPU: integrated
motherboard RAM: 0 MB
maximum RAM: 384/768 MB
number of sockets: 3 -- 168 pin SDRAM DIMM
minimum speed: 100 Mhz/10 ns
VRAM: 2 - 6 MB (2 MB onboard, one socket)
built-in 64-bit 2D/3D graphics accelerator ROM: 4 MB
L1 cache: 32 k data, 32 k instruction
L2 cache: 1 MB backside (1:2)
data path: 64 bit
bus speed: 66 Mhz
slots: 3 PCI, 1 personality
Serial Ports: 2
ADB: 1
Floppy: 1.4 MB SuperDrive, Zip (optional)
HD: 4 GB (EIDE) (base)
CD-ROM: 24x
display: 16 bit (thousands of colors) at 1024x768
Sound Output: stereo 16 bit
Sound Input: stereo 16 bit
Ethernet: 10B-T
Gestalt ID: 510
power: 150 Watts
Weight: 22 lbs. (desktop)/33.1 (MT) Dimensions: 6.3" H x 14.4" W x 16.9" D (desktop)
15.2" H x 9.6" W x 17.8" D (MT)
Min System Software: 8.0
Max System Software: 9.0
introduced: November 1997
terminated: January 1999

Announced in November 1997, The PowerMac G3 knocked the 9600/300 out of the fastest-mac-on-the-planet mark by nearly 10%. Based on a newly designed motherboard (code-named "Gossamer") which ran at a blazing-fast 66Mhz, The G3 was the first Apple-branded Mac to ship with the new PPC 750 Processor. The 750 was co-designed by IBM and Motorola, and was the first processor capable of using a "backside" cache, which could communicate directly with the processor at extremely high speeds.

The G3 came in either a mini-tower case (similar to that of the 8600 & 9600, but shorter) or a 7300-style desktop case, and operated at either 233 or 266 Mhz, with a 512k backside cache operating at 117 and 133 Mhz, respectively. The PowerMac G3 Desktop, available at 233 or 266 Mhz came with 16-bit Audio In and Out on a separate "personality" card and an internal Zip drive (The Gossomer motherboard was so small that there was room for the Zip).

The G3 MiniTower model, which initially was only available at 266 Mhz, had a different personality card, which offered all the features of the desktop card, plus 4MB of VRAM (expandable to 6MB) and S-Video In and Out. The Gossamer motherboard had 3 industry-standard SDRAM slots, allowing for 384 MB of RAM, but due to the height restrictions of the case, the G3 Desktop could not hold 128 MB modules, giving it a maximum of 192 MB. In early 1998, Apple made a 233Mhz tower model available, and added a host of new add-on features for all models including a 4GB fast/wide SCSI disk, and a faster graphics card.

In March 1998, Apple added a 300 Mhz option on all built-to-order machines, as well as a dual-SCSI configuration, with RAID software, and an optional DVD-ROM drive. (a 3rd-party solution were required for MPEG-2 video playback.) A 333 Mhz version was made available in September 1998. The PowerMac G3 was discontinued in January 1999, when it was replaced by the "Blue" G3

Pictures: Apple Corporate Site

Previous Next