Question about IBM ThinkPad T20 2647 Notebook

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Thinkpad T20 won't accept memory upgrade

My T20 has 256MB memory and I want to upgrade to 512MB. I have bought two sets of chips - PC100 and PC133 and neither works. No combination of slots or memory cards work either. The only thing that boots are the two 128 MB PC100 memory cards that came with the machine. Is there some switch I need to change in BIOS? Any ideas? The machine runs Ubuntu nicely and I would like to add more memory to increase response time.

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  • Anonymous May 15, 2009

    the old memory is IBM and the 256 pc100 chips are not marked and the the 256 pc133 chips are Kingston.

  • Sphynkter
    Sphynkter May 11, 2010

    What brand, model, and size RAM did you buy?

  • Frank Zhang
    Frank Zhang May 11, 2010

    whats new memory brand and model? and old one too?

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  • 414 Answers

According to ibm
you are allowed only pc100 memory with a maximum of 512mb.
when handling memory make sure you are grounded before touching any memory chips.
try getting another set of 256mb chips and grounding yourself before installing them.
Mark

Posted on May 15, 2009

  • Mark Gough May 18, 2009

    It doesn't matter the ibm t20 will only accept pc100 memory.

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