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Why does my 32bit ubuntu see 8GB of RAM?

Fresh7 days ago
Mar 15, 20266687 views
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Problem

I have just installed a fresh copy of ubuntu 11.04 32 bit and I was surprised to see that the OS can see my 8GB of RAM not like Windows 32 bit OS. How does it work? How is the address mapping performed? Is it efficient? Why doesn't it work with Windows systems?

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Fix for: Why does my 32bit ubuntu see 8GB of RAM?

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Due to PAE: http://en.wikipedia.org/wiki/Physical_Address_Extension AFAIK Windows client versions, while they support PAE, don't support physical addresses past the 4 GB mark (apparently due to various buggy drivers). Windows server, and Linux, do n…

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