Framerate will drop from 70 to 1 using any of the mobile AA vehicles(Tigris, Cheetah) almost to the point of crashing.
- Legacy ID
Use CSAT or NATO AA (Tigris/Cheetah} and engage anything with it including armored vehicles, cars, aircraft, etc
This goes along with the GMG/HMG weapons on many of the other ground vehicles as well. Possible sound issue? Especially with the new sounds in Dev.
I'm fairly sure this is related to the way sounds are handled. Try dropping the available sound channels in options menu, though this'll probably cut some sounds out. Most integrated soundcards can't handle too many concurrent sounds.
I tried while playing as the gunner of a blackfoot and having it as AI only. Even with the sound samples lowered, went from 128 to 64, I still had problems with the game slowing down. The game actually crashed with the all to common : DX11 error : buffer Map failed : DXGI_ERROR_DEVICE_REMOVED
DX11 - device removed - reason: DXGI_ERROR_DRIVER_INTERNAL_ERROR
after firing the 20mm gun for about 30 seconds without stopping.