When Apple briefly opened its ecosystem to licensed third-party hardware from 1995 to 1998, most Mac clones came in tower or desktop form factors. But Hardware Research, a specialized manufacturer, took a different route with the HR 604e/200—a rackmountable PowerPC Mac clone designed for professional use in studio, server, or industrial settings.
The 604e/200 featured a 200 MHz PowerPC 604e processor, support for dual-processor upgrades, and a healthy 128 MB of RAM out of the box. It came with a 3.1 GB SCSI hard drive, a 24X CD-ROM, and a 4 MB ATI XCLAIM 3D video card—providing solid multimedia capabilities for the era.
This Mac OS-compatible system was built on the Tsunami architecture, the same used in Apple’s Power Macintosh 9500 line. However, what set the 604e/200 apart was its 19″ rackmount form factor, appealing to professionals who needed rack integration in audio/visual production environments or research labs.
Officially sold in early 1998 and discontinued by mid-year, the Hardware Research 604e/200 is now one of the rarest Mac clones ever built.
Here are the complete Mac Clone Specs for this rackmount rarity:
Hardware Research 604e/200 Full Specifications Table
| Specification | Details |
|---|---|
| Introduction Date | January 1, 1998 |
| Discontinued Date | June 1, 1998 |
| Processor Type | PowerPC 604e |
| Processor Speed | 200 MHz |
| FPU (Integrated) | PowerPC 604e |
| System Bus Speed | 50 MHz |
| ROM Size | 4 MB |
| Data Path | 64-bit |
| L1 Cache | 64 KB |
| L2 Cache | 512 KB |
| RAM Type | 70 ns 168-pin DIMM |
| Standard RAM | 128 MB |
| Maximum RAM | 1040 MB |
| RAM Slots | 8 (supports interleaving) |
| Standard VRAM | 4 MB (ATI XCLAIM 3D) |
| Maximum VRAM | 8 MB |
| VRAM Type | Dedicated video card |
| Hard Drive | 3.1 GB SCSI |
| Standard CD-ROM | 24X |
| Floppy Disk Drive | 1.44 MB (manual eject) |
| Modem | N/A |
| Ethernet | AAUI, 10Base-T |
| Case Type | Rackmount |
| Form Factor | 19″ Rackmount |
| Expansion Slots | 6 PCI |
| Expansion Bays (Free) | 1 (5.25″) external |
| Battery Type | 3.6V Lithium |
| Built-in Display | None |
| Supported Mac OS | System 7.5.5, 7.6.1, 8.0–9.0 (officially up to 8.1) |
| Dimensions | 10 x 17.25 x 17.75 inches (H x W x D) |
| Weight | Approx. 52 lbs (23.6 kg) |
| Original Price | $4200 USD |
| Current Est. Price | N/A – Extremely rare |
| Country of Sale | Likely U.S./Europe (not widely distributed) |
| Architecture | Tsunami (Power Macintosh 9500-based) |
Final Thoughts
The Hardware Research 604e/200 was one of the most unique machines of Apple’s Mac clone era. With its rackmount chassis, support for dual processors, and robust RAM and VRAM configuration, it catered to a niche segment of professional users requiring performance and modularity in constrained or rack-based environments.
Although Apple ended its clone program in 1998, this machine remains a compelling artifact for those interested in the rare hardware intersections of enterprise computing and Mac OS compatibility. The 604e/200 is a testament to how diverse the Mac ecosystem could have been—had it remained open.
