This post on the ARMA3 forum might be related to the 3 fps bug problem.

In T123238#1581753, @AtomicTim7 wrote:

I'd be intrigued to see, comparatively, how many instances of the bug/crashes you get with the option enabled. You may find there are more, you may not.

There are my two crash reports. In my case this "3 fps bug" happened couple of times when I was close to the battle and using scope (rifle and vehicle) on MP servers with mods and without mods. One time I got this bug when I was hiding inside building in a town full of enemy AI units and helicopter controlled by the player on enemy side started to make a gunfire from helicopter to the buildings near me. I was looking to the wall inside building at that moment and didn't see any explosions or any visual effects. But second later after I heard that helicopter started fire and heard explosions close to my position I got that "3 fps bug". I suppose that this bug is related to visual effects from weapon shots (fire, smoke, tracers), sound effects from weapon shots, LODs switching between undamaged/damaged states, PhysX.

I was going to disable Intel Virtualization in BIOS to see if it helps and have found that I have already this parameter in disabled state. And it was disabled for a long time on my system. It means that this parameter does not help at all with the "3 fps" bug.