It's not better with DX9, same issues.
But thanks for sharing. :/
Meanwhile i tried so many things, from patch down my Graphiccard driver, over many parameters, over reinstalling Arma 3, so many settings ingame, playin' with the arma3.cfg, defrag. my HDD.
I'm tryin' now the new dev build.
lovin' you BI, dev build fixed it for me now. =)
/edit: I'm not absolutely sure, but i'll hope. Had a Server with above 30 - 35 fps again. :/
/edit 2: Confuse, some Servers run with good performance, another one again with 7 fps ~ :(