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IBM Personal Computer 330 100DX4

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The IBM Personal Computer 330 1000DX4 was a IBM compatible PC released sometime around 1994-1995 and based on the intel 80486 microprocessor. It shares parts and general design with the IBM PC 350 100DX4. There were also DX2 versions of this machine as well.


  • CASE: IBM PC-330 LPX Desktop Chassis
  • PSU: 150 Watt IBM Baby-AT
  • MoBo: IBM T/C 6571 Socket 3 Motherboard with SurePath flash BIOS, Socket 3
  • CPU: Intel 80486 DX4-100MHz CPU
  • RAM: 4MB-128MB, compatible with Parity, non-parity, Fast-Page, AND EDO memory
  • FDD: 1.44MB 3.5" Floppy Drive standard
  • HDD: HDD in capacities ranging from 240MB to 2.1GB
  • OPT: CD-ROM drive optional
  • GFX: On-Board Cirrus Logic CL-5429 1MB SVGA w/ Feature connector
  • SND: Internal Speaker, likely IBM MWave sound card was availible as an option
  • NET: Token Ring, Ethernet, or 3270 Emulator Card
  • O/S: MS-DOS/Windows For Workgroups 3.11, OS/2 2.1, or Windows 95 (later)

Technical Details

The IBM PC-330 and 350 series were often nicknamed the "Select-A-Bus" series because the LPX riser card installed in the system could be either PCI or VESA Local Bus based based on the card installed and a pair of jumpers next to it. It had a 5 chip L2 Cache that could allow for up to 1MB of L2 Cache, and the socket 3 CPU socket could handle 5V and 3.3V CPUs. It was primarily sold as a mid-tier enterprise class machine. It's consumer equivalent would be the early IBM NetVista machines which often used the same components.

Externally, the machines in this series were defined by it's sliding cover that would hide the floppy/cd-rom drives, an IBM Logo that could be turned to put the PC into a "Tower" orientation, and the heavily ridged front bezel. In back there's a white plastic beauty cover that covers the rear of the chassis as well. Typically it shipped with an IBM G-40 monitor, PS/2 mouse, and Model "M" Keyboard.

See Also