This document provides a comprehensive overview of the IBM IntelliStation POWER 185 (Type 7047), a unique and often misunderstood AIX-compatible workstation released in 2006. The system is notable for using the PowerPC 970 processor, the same CPU found in Apple's Power Mac G5, yet it functions as a true POWER architecture machine due to its firmware supporting hardware virtualization—a feature absent in the G5. Originally derived from the System p5 185 server, it was designed to be a quieter, lower-power solution for the high-end UNIX CAD market. Key technical peculiarities include running its dual-core PowerPC 970MP chips in a thermally-managed single-core mode. The workstation was optimized for AIX to leverage specialized hardware like high-performance GXT series GPUs, as POWER Linux support was limited and dropped early. The document details its market history, eventual decline with the collapse of the UNIX CAD ecosystem, hardware specifications, and legacy as a rare machine primarily used by government and engineering firms.
The IBM IntelliStation POWER 185: An In-Depth Look
A Unique Hybrid Architecture: Released in 2006, the IntelliStation POWER 185 uses the PowerPC 970 CPU, but its firmware makes it a true POWER system. Unlike the Apple Power Mac G5 which uses the same chip, it supports hardware virtualization, allowing it to run IBM's AIX operating system.
Server Guts in a Workstation Body: The machine is a modified version of the IBM System p5 185 server (7037-A50), repurposed to be a quiet, deskside workstation for CAD and engineering tasks. It features extensive acoustic foam lining to minimize operational noise.
Unusual Processor Configuration: To manage heat in its smaller form factor, the POWER 185 runs its dual-core PowerPC 970MP processor in a special single-core mode. A dual-processor configuration was offered to simulate a dual-core setup using two of these discreet, single-core-mode chips.
Optimized for AIX, Not Linux: AIX is the recommended operating system to take full advantage of the hardware. High-performance, IBM-designed CAD graphics cards like the GXT4500P and GXT6500P are only supported under AIX. Support for POWER Linux is limited, with newer distributions dropping support for the PowerPC 970 architecture.
The Last of the UNIX CAD Machines: The POWER 185 was created when UNIX workstations still held advantages over 32-bit Windows XP systems for memory-intensive tasks like CAD. The entire IntelliStation line was discontinued by 2009 as the market shifted to 64-bit Windows, effectively ending the era of UNIX CAD workstations.
Specific Hardware Considerations: The system has a sensitive PCI-X slot layout where adapter placement is crucial for optimal performance. Different slots are tied to different buses with varying speeds (133 MHz, 100 MHz, and 33 MHz).
Advanced Control and Diagnostics: The workstation features a detailed front control panel that provides functions for selecting boot modes, running lamp tests, monitoring fan speeds and temperatures, and viewing system information without needing a console.
Legacy and Availability: The POWER 185 was widely used in government and engineering, with a large number of units from the U.S. Department of Defense entering the resale market around 2016. Despite this, it remains an elusive and relatively unknown machine.