HI,

Well that's not entirely true. Because now its running 3gb and even if i replace the fourth module with one that's in there now, i get an instant error.
And Vista will support 4gb or ram as long as you are using Vista 64bit.

And for the drivers i can only say, i used the same nvidia driver on my new 8800 as on my old 8800. And everything worked fine at first...

I'm sure that in my case one of my RAM-modules broke, and finally i know wich one :P

Greetz and goodluck