4GB Kingston RAM shown as 3.2GB in Windows

[Blazej]

I bought a 4GB Kingston RAM and installed on ASUS P5Q PRO P45 Motherboard.

My problem is that it is shown as only 3.2 GB in Windows. Is this normal? What can I do to increase the RAM?

[arturro]

Quiet normal, and I bet you are using 32 bit operating system; whereas you can see the complete 4GB RAM in the bios.

4 GB Ram shown as 3070 MB

[Fabian]

I read this article on Mac.

What you mention is quite common on a 32 bit operating system. So in my opinion it is crazy to buy 4GB of RAM if you are getting only 200MB to use extra for it. Buy max 3GB.

[Ashok.M]

Also remember that every operating system have some limit, if you buy 64-bit operating system (lets say Vista) then there are still limits on how much RAM you can use.

Home Basic = 8GB
Home Premium = 16GB
Business = 128GB

However I don't know why Microsoft has set such limits.