The MacWorks Millennium G3/325 was one of the boldest and most expandable Macintosh clones ever sold. Based on the Tsunami architecture and launched in April 1998, this machine shipped with a 300 MHz PowerPC 750 (G3) processor overclocked to 325 MHz and supported configurations with 64 MB RAM, a 2.0 or 4.0 GB Fast-SCSI II drive, and a 4MB Initio video card.
The black tower case, inherited from DayStar’s multiprocessor line, was designed to support up to four processors, although only one G3 processor came pre-installed. The MacWorks Millennium G3/325 was discontinued barely a month later, making it one of the rarest G3 clones from the late 1990s.
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 (expandable to four processors) |
| 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 builds) |
| Maximum RAM | 1536 MB |
| RAM Slots | 12 |
| Video Card | Initio 4 MB (optional) |
| Maximum VRAM | 8 MB |
| Hard Drive | None, 2.0 GB or 4.0 GB (customizable) |
| Drive Interface | 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 | $2,500–$3,000 USD |
Mac Clone Performance with Room to Scale
With its open expansion path to four CPUs, the MacWorks Millennium G3/325 served high-end users in science, design, and server applications—offering power once exclusive to Apple’s own internal development units. The bold decision to use a modified DayStar chassis and overclocked CPU gave this system a lasting legacy among clone collectors and Apple hardware historians alike.
