I believe the reason it shows you as having 3,428 MB is because that is not only the amount of RAM you have, but the total virtual memory. Virtual Memory includes both the RAM space, and the page file.
I second that.
for n = 4 -> infinity:
If you are looking at what I think you are looking at you are actually seeing your commit charge. http://en.wikipedia.org/wiki/Commit_chargeNow when I open up the list of processes running, it shows that I have a total of 3428 M