http://www.ubuntugeek.com/how-to-use-more-than-3gb-ram-on-32-bit-ubuntu.html
How to Use more than 3GB RAM on 32-bit Ubuntu
Posted by admin on September 23rd, 2008 Email This Post Email This Post
Currently It seems that the current 32 bit editions of Ubuntu can only take advantage of 3GB (sometimes a little more) of physical memory. Desktops and gaming rigs using 6 and 8 GB of RAM are ubiquitous now.I am having a ubuntu desktop with 5GB RAM and i want to use all the available memory for gaming.
Procedure to follow
You need to install the following packages and restart your PC
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sudo apt-get install linux-restricted-modules-server
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sudo apt-get install linux-headers-server
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sudo apt-get install linux-image-server linux-server
That’s it after rebooting you should be able to see all the memory available in your system.



