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PC2700 SDRAM UDIMM Family Memory Upgrades - Overview

memory dimm

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At a glance

The new memory upgrade offerings let you upgrade standard system memory capacity, helping to improve overall system performance.


  • Test-proven 100% compatibility
  • PC2700 double data rate (DDR) synchronous dynamic random access memory (SDRAM)
  • Maximum data transfer rate of up to 2,700 MBps
  • 184-pin unbuffered DIMM (UDIMM) with gold-plated leads
  • Serial presence detect/decode functions
  • Limited warranty
  • Authenticity seal on every UDIMM


3 year Limited - customer carry-in exchange


You will receive one box containing the following items:

  • 128 MB, 256 MB, 512 MB, or 1GB PC2700 CL2.5 Non-Parity DDR SDRAM UDIMM Memory
  • Publication

Product dates


  • Announce date: 21 May 2003
  • Planned availability date: 21 May 2003
  • Effective withdrawal date: 23 Aug 2005 (128MB only)
  • Effective withdrawal date: 11 Apr 2006 (256MB, 512MB, 1GB)

Technical specifications

Performance specifications as known at time of announcement

  • PC2700 DDR SDRAM Memory Upgrade: The 2700 is a figure derived from twice the memory-side bus clock frequency (166 MHz x 2; data transfers can occur on both edges of the clock) times the module data width (64 bits / 8 bits/byte = 8 bytes) = 2,656, rounded = 2,700. This is the maximum data rate; the units are MBps.
  • Column Address Strobe (CAS) Latency (CL) of 2.5 (memory bus clock cycles).
  • Non-parity mode organized as 16M x 64, 32M x 64, and 128M x 64 respectively.
  • Serial presence detect.
  • 184-pin JEDEC/EIA standard UDIMM interface.
  • Gold-plated leads.

Physical, environmental, and compatibility specifications as known at time of announcement


  • inches: .15
  • mm: 3.8
  • inches: 5.25
  • mm: 133.4
  • inches: 1.38
  • mm: 35.7

Operating temperature

  • between 0 degrees Celsius and 65 degrees Celsius
  • between 32 degrees Fahrenheit and 149 degrees Fahrenheit

Relative humidity

  • Operating: between 10% and 90%

Hardware compatibility

Hardware Requirements

The 128MB, 256MB, 512MB, and 1GB PC2700 CL2.5 Non-Parity DDR SDRAM UDIMM memory upgrades are supported on the following systems:

System Name Machine TypeModel
ThinkCentre A302296, 8191, 8198, 8199, 8316, 8434All
ThinkCentre A508320All
ThinkCentre A50p8192, 8193, 8194, 8195, 8196, 8197All
ThinkCentre M508185, 8186, 8187, 8188, 8189, 8190All
ThinkCentre S508183, 8184All

Hardware Requirements -Other Systems

The 128MB, 256MB, 512MB, and 1GB PC2700 CL2.5 Non-Parity DDR SDRAM UDIMM memory upgrades are supported on systems that support industry-standard SDRAM to the PC2700 CL2.5 UDIMM specification.


Some configurations may not be compatible.

Installation time

Approximately five minutes.

If you are unable to find what you are looking for, please do try the following options:
1. Lenovo Assisted Search
2. Product usage and general troubleshooting tips
3. Lenovo Support Forum
4. Technical Support Call Centre

Dokument-ID : PD014030
Legacy Document ID : MIGR-51182
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