Srdan,
I think that I found the discussion with Umberto that you are referencing. I know that Efrain saw an average of 2.6gb of vram usage with his tileproxy flight but I certainly do not want a bunch of OOM errors do deal with either after spending so much $$$. So, I'm not really sure what to do now. Also, I'm not using tileproxy but rather gex, rex, orbx and highres aircraft textures when available. I know from reading the forums that both of you gentlemen have high FSXIQ ( intelligence, not image quality, though I'm sure you have that too so I am looking forward to your responses.
Jamey