How to do that.
My problem appears only in multiplayer sessions

The result of the DX11 test is attached.

Yes, I think I tried almost every things, even playing with minimum details and playing on server that allow no grass.

The problem does not seems to be linked with graphic settings.

yes, I had this problem since the beginning.
I try again on Friday to play with cars. I had some lag but no crash when I played a multi on straits.
Then I played another multi on altis and the problem came again when driving.
I noticed that I had a big lag and then crash when arriving to a town.

dxdiag uploaded
Other files here : http://wikisend.com/download/118256/yac_local_arma3.zip

Many thanks for your support to solve this problem