i am trying to place a large 3d model in the scene of the game (it is a building) , but everytime i try to do that it makes unity crash. Do i need a better Video Card ?
Do i need to upgrade the memory ( currently i have 4GB RAM and i thought that it is a lot) ?
Is there a way that i can load the model part by part so that i can avoid crashing of unity?
I had similar problems with some of my models. However, the editor only crashed for me when I was trying to move the model via the transform gizmo. You might have to split the geometry in your modeling application and import it piece by piece. That circumvents the 65000 vertices limit and also might gives you a more stable experience with the Unity editor. A better video card or memory upgrade didn't cut it for me as I tried with several development machines of varying performance.
Splitting up your model is a bit of manual labor, but it's worth a shot. Try to split the model in 2 pieces first and put it into a clean/empty project and see what happens.