The MacWorks Millennium G3/325 is a rare and ambitious Mac clone built for ultimate scalability. Designed around the Tsunami architecture and launched in April 1998, this model came with a 300 MHz PowerPC 750 (G3) upgrade card overclocked to 325 MHz, offering excellent performance for its time.
What set this tower apart was its quad-processor expandability — a rarity among G3-based clones. While it shipped with a single G3 processor, users could configure it with up to four PowerPC CPU cards, making it highly attractive for power users, video editors, and scientific applications. Its black tower case and modular design aligned with the pro workstation aesthetic.
MacWorks Millennium G3/325 – Full Technical Specifications
| Component | Specification |
|---|---|
| Model | 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 |
| FPU | Integrated (PowerPC 750) |
| Processor Upgrade | Daughtercard, expandable to four CPUs |
| Level 1 Cache | 64 KB |
| Level 2 Cache | 1 MB (backside) |
| Level 3 Cache | 512 KB |
| Data Path | 64-bit |
| ROM Size | 4 MB |
| RAM Type | 60 ns 168-pin DIMM |
| Standard RAM | None or 64 MB |
| Maximum RAM | 1536 MB |
| RAM Slots | 12 |
| Video Card | Initio with 4 MB VRAM |
| Maximum VRAM | 8 MB |
| Standard VRAM | None or 4 MB |
| Hard Drive | None, or 2.0/4.0 GB Fast-SCSI II |
| CD-ROM | 24X |
| Floppy Drive | 1.44 MB (manual eject) |
| Modem | Not included |
| Ethernet | AAUI, 10Base-T |
| 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 (Officially up to 8.1 only) |
| Dimensions (HxWxD) | 21.0 x 8.5 x 22.0 inches |
| Weight | 50 lbs |
| Original Price | $2500 or $3000 USD (depending on configuration) |
Performance & Expandability
The MacWorks Millennium G3/325 was more than just a fast Mac clone. Its support for up to four processors made it a futuristic workstation for its time. While only one overclocked G3 chip was included by default, the option to expand offered real-world performance improvements, particularly for users running multi-threaded applications or advanced server roles.
The Fast-SCSI II interface, up to 1536 MB of RAM, and multiple 3.5″ internal drive bays made it an ideal foundation for demanding workflows in graphics, data crunching, and server operations.
