The MacWorks Millennium G3/325 is a rare and ambitious entry in the Mac clone world. This tower workstation, introduced in April 1998, featured a factory-overclocked 325 MHz PowerPC 750 (G3) processor card, and support for up to four CPU modules, making it one of the most expandable Mac clones ever released. It shipped in several configurations, ranging from an empty expandable case to fully loaded systems with 64 MB RAM, 2.0 or 4.0 GB Fast-SCSI II hard drives, and a 4MB Initio video card.
The Millennium G3/325 was based on the Tsunami architecture and the DayStar tower form factor, giving users a wide variety of expansion options. Its brief production run — discontinued just a month after launch — makes it a coveted collector’s item among vintage Mac enthusiasts.
MacWorks Millennium G3/325 – Technical Specifications
| Component | Details |
|---|---|
| Model Name | MacWorks Millennium G3/325 |
| Architecture | Tsunami |
| Form Factor | DayStar Tower (Black) |
| Processor Type | PowerPC 750 (G3) |
| Processor Speed | 325 MHz (Overclocked from 300 MHz) |
| Backside Bus Speed | 216.6 MHz |
| System Bus Speed | 50 MHz |
| Level 1 Cache | 64 KB |
| Level 2 Cache | 1 MB (backside) |
| Level 3 Cache | 512 KB |
| Processor Upgrade | Daughtercard (up to four CPUs supported) |
| FPU | Integrated (PowerPC 750) |
| ROM Size | 4 MB |
| Data Path | 64-bit |
| RAM Type | 60 ns 168-pin DIMM |
| Standard RAM | None or 64 MB (custom) |
| Maximum RAM | 1536 MB |
| RAM Slots | 12 |
| Video Card | Initio with 4 MB VRAM (customizable) |
| Maximum VRAM | 8 MB |
| Hard Drive | None, 2.0 GB or 4.0 GB (Fast-SCSI II) |
| CD-ROM Drive | 24X |
| Floppy Drive | 1.44 MB (manual) |
| Ethernet | AAUI, 10Base-T |
| Modem | Not included |
| Expansion Slots | 6 PCI |
| Expansion Bays | 1 (5.25″ external), 6 (3.5″ internal) |
| Battery Type | 3.6V Lithium |
| Built-in Display | None |
| Supported Mac OS | 7.5.3–7.6.1, 8.0–9.0 (no official Apple support beyond 8.1) |
| Dimensions (HxWxD) | 21.0 x 8.5 x 22.0 inches |
| Weight | 50 lbs |
| Original Price | $2500–$3000 USD |
Designed for Serious Expansion
The MacWorks Millennium G3/325 was ahead of its time with its quad-CPU support potential, massive RAM ceiling, and custom configuration flexibility. Though its market life was short, its legacy remains significant for those who desired maximum scalability in a Mac-compatible system during the clone era. Whether used as a bare chassis or a performance workstation, this model exemplified MacWorks’ pursuit of modular, professional-grade computing.
