Well i've created a ram disk 2 gb and put the files in it that Gratos suggested.
It was just to play around a bit as I dint experience stutters or hangups.
The only increase I got was when taking off or landing when looking behined me at the dust or on a single mission with an airstart I used to have a few akward seconds before I had control of the aircraft.
That also is now gone and control is inmedeate.
Normaly I would get 11FPS while doing that now its going down only to 25 FPS.
While tinkering I found that my overall FPS doesnt go below 42 very low on the deck or with explosions and so on.
Another observationis that the vram used never seem to exeed 1005 MB and mostly hovers around 995 MB.
So it seems a 1BG card is sufficient.
For my in game settings see
http://forum.1cpublishing.eu/showthread.php?t=29561
I think I keep the ram drive for now.