I have Vista Ultimate 64bit and I'm trying to use 4GB RAM but only 2GB is showing up. I have done this before and it worked fine but I recently reinstalled it and it wont recognise the extra 2GB. Everest shows 4x 1GB sticks installed and I have tested each stick and they all work fine. I have tried different configurations and still nothing. However, if I load XP up it shows 3.25GB which would indicate that they do work.
Is Vista using 2GB for system resources?
Is Vista using 2GB for system resources?
