T420 ThinkPad RAM upgrade compatibility question?

[Liam Proven]

On Tue, 15 Oct 2024 at 13:15, Ian Bruntlett <ian.bruntlett at gmail.com> wrote:
>
> OK.  My initial post did cite quite a bit of information. See the bottom of this email to see more details.
>
> What kind of information am I missing?

You give info about the memory, but not about the computer.

There are 7 different models of T420:

https://www.thinkwiki.org/wiki/Category:T420

Plus 6 of the T420S, but you'd probably mention that.

https://www.thinkwiki.org/wiki/Category:T420s

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