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Green 144-pin SODIMM memory module with black chips

Computer Memory Solutions

Computer Memory Solutions CM3264100SO16C 256MB PC100 144-Pin SODIMM memory upgrade

SKU CH-G32Q-HFBPM

256 MB PC100 SODIMM adds memory to compatible IBM ThinkPad 390X, 570, 570E, 600E, 600X and A20m systems

  • Capacity256MB
  • Type144-Pin SDR SO-DIMM
  • SpeedPC 100
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor Brand Chipset
  • Adds 256MB to compatible ThinkPad models
  • PC100 100 MHz SDRAM SO-DIMM standard
  • 144-pin unbuffered non-ECC module design
  • Tested for IBM ThinkPad 390X 570 570E 600E 600X A20M
  • Single stick kit from CMS brand

Purpose-built notebook upgrade

This 256 MB PC100 SODIMM is engineered for the IBM ThinkPad 390X, 570, 570E, 600E, 600X and A20M models. It uses a 144-pin SDR SO-DIMM form factor and runs at 100 MHz without ECC or buffering. The single stick installs directly into one of the two sockets these systems provide.

Who this fits

Owners of the listed ThinkPad models who need to reach the 512 MB maximum will find this module a direct match. It is not for machines that require a different pin count, a higher speed grade or registered memory. Buyers working on any other notebook, desktop or server platform should look elsewhere because the 144-pin SDR form factor and PC100 speed are not interchangeable with later SO-DIMM types.

Deciding specification

The 144-pin SDR SO-DIMM interface at PC100 is the single detail that determines fit. If the target system calls for this exact combination the module will seat and run; if the board expects a different pin layout or memory technology it will not work.

Punti di forza

  • Adds 256MB to compatible ThinkPad models
  • PC100 100 MHz SDRAM SO-DIMM standard
  • 144-pin unbuffered non-ECC module design
  • Tested for IBM ThinkPad 390X 570 570E 600E 600X A20M
  • Single stick kit from CMS brand

Caratteristiche tecniche

BrandComputer Memory Solutions
ModelCM3264100SO16C
Capacity256MB
Type144-Pin SDR SO-DIMM
SpeedPC 100
ECCNo
Buffered/RegisteredUnbuffered
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemIbm Thinkpad 390X, 570, 570E, 600E, 600X, A20M
Package Content1 Memory RAM Stick

Domande su questo articolo

How much power does this PC100 144-pin SODIMM draw during continuous use in a ThinkPad 600X?

The module is an unbuffered SDR SODIMM without a heat spreader, typical for low-power laptop memory of this era.

What must the laptop provide for this 256 MB stick to be recognised?

A free 144-pin SODIMM slot that accepts PC100 SDRAM; the ThinkPad 390X, 570, 570E, 600E, 600X and A20M each have two such sockets.

Can this module share a ThinkPad 570E with an existing PC100 SODIMM of a different capacity?

Yes, the listed models support two SODIMMs up to a combined 512 MB, so a second PC100 stick of any supported size will work alongside this one.

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