Based on my "old" experience, 32bit OS should be only support RAM less than 3.5~4GB, but why ubuntu 32bit supports RAM over 4GB. I didn't install any 3rd party software, or anything to do with PAE tools.
- VMWare Workstation 9
- Ubuntu 12.04.02 32bit Desktop Version
Please refer to the image below:
ubuntu 12.04.02 ram usage.jpg
It would be appreciated for any comments on this.