My window to the world


Why Windows Vista on your PC with 4GB RAM can only see 3GB - or less...

By Mauricio Freitas, in , posted: 16-Apr-2007 13:48

Many times I've seen people asking "I have 4GB RAM on my PC but Windows Vista can only see 3GB. What's going on?"...

I know. It even happened to me. I installed 4GB on my desktop and Windows Vista reported only 3GB total. I thought something was wrong with the memory, shuffled it around, ran memory tests, but nothing worked.

Then I read this: The 3GB not 4GB RAM problem. The author explains why and how. First we find out that there's a limit of memory a 32 bit system can address. But even so, the actuall memory is less than the addressable limit, because of reserved memory imposed by chipsets.

Even though Windows Vista 64 bit has a much higher limit (128GB RAM), it may still be limited, depending on the chipset!


If you are running 32-bit Windows, you must live with it. You will not ever see all 4GB of RAM you've paid for.

If you are running 64-bit Windows, you may have to live with it. Depending on your motherboard's chipset, your system may support memory remapping. If so, you will be able to use all 4GB of RAM.


Interesting read.


Tag(s):         


Other related posts:
Windows 8 Mail app not hyperlinking emails
Are we seeing the death of Windows RT?
Windows 8 Consumer Preview






comments powered by Disqus

freitasm's profile

Mauricio Freitas
Wellington
New Zealand


I live in New Zealand and my interests include mobile devices, good books, movies and food of course! 

I'm the Geekzone admin. On Geekzone we publish news, reviews and articles on technology topics. The site also has some busy forums.

Subscribe now to my blog RSS feed or the Geekzone RSS feed.

If you want to contact me, please use this page or email me freitasm@geekzone.co.nz. Note this email is not for technical support. I don't give technical support. You can use our Geekzone Forums for community discussions on technical issues.

Here's is my full disclosure post.

A couple of blog posts you should read:

Social networks presence

View Mauricio Freitas's profile on LinkedIn


My Blog by tags...

Blog...
Entrepreneurship...
Media...
Personal...
State of Browsers...
Technology...
Viral Marketing...
Web Performance Optimization...
Windows...
Windows Phone...

Other recent posts in my blog

Microsoft Ignite New Zealand, ...
If the headlines indicate the ...
Geekzone data analytics with P...
State of browsers Geekzone Mar...
2Cheap Cars discussion...
Now with more fibre...
Unlimited is not unlimited: Vo...
How bad is Vodafone cable at t...
Frustrated with Microsoft Fami...
State of browsers Geekzone Mar...

New posts on Geekzone