I have a Dell Dimension XPS 600 running Windows XP Media Center 2005. It has 4GB of RAM installed. I thought that Windows XP, all flavors, could recognize up to 4GB of RAM. Yet when I boot into the OS only 2GB show. The system recognizes 4GB of RAM on POST. I have used all the different boot.ini configurations (i.e. /PAE, /3GB, etc.).
If anyone has any idea please contribute, thanks.