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I'd like to add more RAM to my Ubuntu installation ( running on a Dell Inspiron 640m ). Is there any inbuilt command or package to find out the current RAM chip specifications (manufacturer, type, speed etc) from within Linux ?

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up vote 12 down vote accepted

This might help: Linux: Check Ram Speed and Type.

sudo dmidecode --type 17

Alternatively, if you can boot from a windows system, the Crucial System Scanner tool will give very good details on what is installed and what can be upgraded on the system (along with a shopping cart too). It will need an Internet connection.

Here is a quick reference from Crucial:
Guaranteed-compatible memory upgrades for your Dell Inspiron 640m Laptop/Notebook

I am assuming, you do not want to open the system and look at the memory sticks.
That is quick and simple too.

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3  
In the absence of a better answer, I'll accept this. However, you might want to edit and paste the dmidecode --type 17 ( or equivalent: dmidecode -t memory ) commands into the answer in case the link vanishes in future. – nagul Aug 10 '09 at 10:43

As an alternative approach, since your machine is from a major manufacturer, you can use an online tool such as Kingston's memory search to lookup the memory type from the model number.

Search Results for: Dell Inspiron 640m

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