I just recently upgraded my pc to windows 7, and while for the most part I like it better than vista, I have noticed that for some reason FFXI uses a ton more ram. With vista, I was able to comfortably quad box (for einherjar mules, etc.) and still have capped fps. However, on windows 7, performance starts taking a huge hit after 2 instances, and I noticed that the computer is using over a gig of ram per instance (task manager processes tab shows around 700mb, but resource monitor shows the system has over 200mb more per instance in the commit charge).

What the heck is causing this? I have tried looking around and not found anything like this. My settings are all the same as what I used on vista.

Edit: I have tried disabling superfetch and it had no effect on my performance.