Vista + 8 Gigs of memory = overkill ?

I just switched over to Vista Ultimate x64 from XP Home a little over a month ago. I have since increased my memory to a total of 4 gigs. Would increasing the Ram show any improvement in performance, if so, would doubling my memory to a total of 8 gigs be beneficial in any way ?

there is no need for 8 gigs for anything.

vista idles at around 600mb on my system i think.

Yeah, unless you have a specific application that needs that much RAM, its not going to make much or any difference.

Only when running heavy graphical programs 8 GB RAM could be usefull, just fir regular gaming and computer use, 4 GB is more then enough.

Nowadays 2 GB is normal.