I’ve just upgraded my Dell M65 from 2GB of RAM to 4GB because I’m going to use some VM. As I wrote some posts ago, I’m running Windows 7 (64 bit) in this laptop, so I expected to see the whole 4GB of RAM available. However, it seems that this laptop maps some device’s memory into RAM and therefore only 3326MB of RAM are available.

I’m posting this because it can confuse some people. 3326 MB is almost the same amount of RAM (3325MB) that is available on my 4GB desktop computer which runs Vista 32bit. However, the Vista machine looses some RAM because is running a 32bit Windows and the laptop because the hardware is using some system RAM.