The Hardware Research 750/300 was among the most powerful rackmount Mac clones built on Apple’s Tsunami architecture. Featuring a 300 MHz PowerPC 750 (G3) processor, 80 MB of RAM, and a fast SCSI-based 6.0 GB hard drive, this model was optimized for serious compute tasks and professional environments.
This system offered PCI expandability, an ATI XCLAIM 3D video card with 8 MB of VRAM, and Mac OS 8.0 to 9.0 support, making it one of the most capable pre-G4 workstations of its time. Rackmountable and robust, it could even be upgraded to a dual-processor setup.
Hardware Research 750/300 – Technical Specifications
| Component | Details |
|---|---|
| Model Name | Hardware Research 750/300 |
| Architecture | Tsunami |
| Form Factor | 19″ Rackmount |
| Processor Type | PowerPC 750 (G3) |
| Processor Speed | 300 MHz |
| System Bus Speed | 50 MHz |
| Backside Bus Speed | 300 MHz |
| Level 1 Cache | 64 KB |
| Level 2 Cache | 1 MB (backside) |
| FPU | Integrated (PowerPC 750) |
| ROM Size | 4 MB |
| Data Path | 64-bit |
| RAM Type | 70 ns 168-pin DIMM |
| Standard RAM | 80 MB |
| Maximum RAM | 1040 MB |
| RAM Slots | 8 (no onboard RAM) |
| Hard Drive | 6.0 GB SCSI |
| CD-ROM | 12X |
| Floppy Drive | 1.44 MB (manual eject) |
| Video Card | ATI XCLAIM 3D with 8 MB VRAM |
| Maximum VRAM | 8 MB |
| Expansion Slots | 6 PCI |
| Expansion Bays | 1 × 5.25″ (external) |
| Ethernet | AAUI, 10Base-T |
| Modem | Not included |
| Battery | 3.6V Lithium |
| Built-in Display | None |
| Dimensions (HxWxD) | 10 x 17.25 x 17.75 inches |
| Average Weight | 52 lbs |
| Original Price | $6300 US |
| Mac OS Compatibility | 7.5.5, 7.6.1, 8.0 to 9.0 (officially supported up to 8.1) |
Designed for Professional Power Users
With 300 MHz G3 performance, high RAM ceiling, and SCSI storage reliability, the Hardware Research 750/300 was a go-to option for video editing, server tasks, and demanding Mac OS applications. Its rackmount case made it ideal for professional studio environments or server rooms.
