IBM 3003 256MB Main Storage DIMM

The IBM 3003 256MB Main Storage DIMM is a legacy memory module designed for capacity expansion in compatible older IBM Power Systems, iSeries, and pSeries servers. This 256MB DIMM provides significant RAM increase to support growing AIX and IBM i workloads, helping maintain or improve performance in production, development, or test environments on supported legacy hardware.

Built to IBM specifications, the 3003 ensures stable operation, full compatibility, and long-term reliability for systems running mission-critical legacy applications. Ideal for memory upgrades, replacements, or preventive maintenance on older platforms still in service.

Key Features

256MB capacity per module
Main storage DIMM (DRAM) technology
Designed for legacy IBM Power/iSeries/pSeries systems
High-reliability enterprise-grade memory
Supports AIX and IBM i operating environments
Easy plug-in installation in compatible memory slots

Specifications

Feature Code / Part Number: 3003
Capacity: 256MB
Memory Type: Main Storage DIMM (DRAM)
Form Factor: Proprietary IBM DIMM for legacy systems
Compatibility: Select older Power Systems, iSeries, pSeries models

Compatibility

This IBM 3003 256MB Main Storage DIMM is compatible with select legacy IBM Power Systems, iSeries, and pSeries servers that support this memory type, including (but not limited to):

iSeries 170, 620, 720
Mixing #3003 and #3004 within pairs (or quads on Processors #2385, #2386, #2388 when more than eight memory features are installed) is not allowed
Minimum OS/400 level: V4R3 Supported on processors #2385, #2386, and #2388 only
Systems using 3003 or equivalent memory slots

Verify exact system model, memory slot type, firmware level, and maximum supported memory configuration before installation. Compatible with AIX and IBM i operating systems on supported hardware.

IBM 3003 256MB Main Storage DIMM

Product Description