Memory Upgradation from 2GB to 4GB

Asked by Om Prakash on 2009-05-07

Earlier I had 2GB of RAM in my Notebook. Over this I had installed Ubuntu 8.4 (32 Bit). Later I had upgraded it into 9.04 version,

As I am using Windows 2003 Server as Virtual OS over it I had upgraded my RAM from 2GB to 4GB. On BIOS Setup screen my notebook is identifying 4GB of RAM but while booting with System Check it is counting upto 3GB only.

Again after booting Ubuntu I only find 2.9GB of RAM detected.

Is there any possibility to use the full extent of 4GB of RAM.

My Notebook Configuration is

HP Compaq Presario C773TU Notebook
Intel Core 2 Duo 1.83GHz Processor
BIOS Version 3.0

Waiting for a appreciable solution.

Question information

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Ubuntu Edit question
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Solved by:
Ian Ace
Last query:
Last reply:
Best Ian Ace (iaculallad) said : #1

In order to maximize your RAM installed, you need to install the 64-bit Ubuntu version or you might want to install the PAE-enabled kernel on your 32-bit version of Ubuntu.

Om Prakash (om-mishra) said : #2

Thanks Ian,

I installed PAE enabled kernel and it solved my problem. Now I am able to see 3.9GB of RAM

Thanks Again

Fabián Rodríguez (magicfab) said : #3

Fabián Rodríguez suggests this article as an answer to your question:
FAQ #669: “I have 4GB or more of RAM but can't see it in Ubuntu. How can I enable support for all my RAM ?”.