Yes I know, but my friend has Dell XPS 410 with Vista home premium, and it read 3GB. That's why Iâ€™m confused maybe because of the Vista.
Anyways if you have some questions about that sort, make a thread and we can help you .
That rig is pretty smoking though! I wouldn't worry about the RAM much yet, but when you do go vista for dx10 games make sure to pick up the x64 version to take advantage of all that nice RAM.