Fear is a liar.
I am known as MrStone in Survarium. I am known as Kronos in Warface. I have played my fair share of stalker like games and enjoy new experiences.
You could try using Rivaturner to monitor your Gpu usage and Cpu usage as well as Ram. Just to see if its your system getting bottle necked for example from a memory leak. But most likely the issue will be resolved as more performance updates roll out. After all it is a beta.