ArmA 3 Alpha - FPS in a Huge FireFight ( 60 Soldiers ) HD 720p

Here's a simple test of a 60 Soldiers firefight ( 30 Vs 30). I made this to test my Fps in combat. I was thinking that the AI drop dammatically the FPS in the gameplay however if we are in openfield or in the deep forest, so i made this video to prove it. At some point during the Firefight the FPS count go from 30 to 10. My Specs are: - Intel COre I 5 3.20 GHz 3.20 GHz - 10 GB Ram - NVIDIA GeForce ZOTAC GTX 580