Question about IBM ThinkPad T40 2373 Notebook

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IBM ThinkPad T40 2GB Max RAM

Hi I own a IBM ThinkPad T40 and going to install 2GB RAM. it has right now 512MB on the bottom door and 256MB if I remove the keyboard to get to it. I have Microsoft Windows Vista on it and it just reads the 512MB, So I'm guessing the 256MB is not ment to be removed and is needed for it to start the laptop and doesn't count with the 512MB socket area, and Woundering if I could still install the 2GB RAM Max. I have the Manual of my T40 and it states that 2GB is its Max.

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  • Patrick Bridge
    Patrick Bridge Jul 08, 2008

    No the 256MB Reads, PC Doctor 5 saying its a Viking 256MB RAM Chip as what it says on the screen and the 512MB is a kingston

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Why the hell did IBM locate the 2nd RAM slot under the keyboard?!

Why don't they just put both in the same place like normal lappy's

=] just sayin'

Posted on Oct 26, 2008

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My T40 came standard with 256MB of memory in each memory slot, totaling 512MB of memory. I just got two of the same 1GB DDR 266 memory sticks and tried to install them both. I installed both memory sticks, but when I tried to boot my laptop it @ first it stared to beep, then nothing worked. After that I uninstalled the base memory (the one under the keyboard) and put back in the 256MB memory stick (the original one), and then my laptop started just fine, saying that there was 1.28GB (1GB + 256MB).

Does anyone know why the base memory slot will not take my 1GB memory stick???

Thank u.

Posted on Sep 06, 2008

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The T40 has two ram slots, you can put a 1g chip in each totaling 2g. If the chip will remove, then it is changeable. Vista needs a minimum of 256 to run, so, when you change BOTH chips to equal 2g it will probably read 1.744g, or it may read the full 2g. If it only reads 1g, then the second slot under keyboard may have malfunctioned. It could also be that the 256 chip is bad and your really only running 512 now. With all that said, in order to achieve 2g, you will need to put a 1g chip in each slot.

Posted on Jul 08, 2008

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Maximum memory for this model is 512mb, no cpu upgrade neccessary. 2 x 256mb sticks is OK.

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Hi - according to memory suppliers your T23 has the following memory capacity / requirements:

  • IBM ThinkPad T23 maximum RAM capacity: 1GB
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If you are meeting these requirements, you may have a defective module.

Also, according to Lenovo's page on the machine:

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I have Ubuntu 10.10 installed on my IBM R40 laptop computer. Although I installed two 512 MB PC2100 266 Mhz memory to both slots. However the computer only sees 512 MB. When I installed Ubuntu I perhaps...


Well, what a mine field!
I found this;
There are at least 9 different R40 Thinkpad models. Look for a label underneath & see if there's a "Type" number...something like 2681, 2682, etc. Once you find the number, go to the following site & select your model/type from the dropdown menu:
http://www.crucial.com/store/listmodel.asp?cat=RAM&mfr=IBM&productline=ThinkPad&submit=Go

And being a 256Mb standard, that may be all it can handle. The above link is rather old but worth a try.
Hope this helps.

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