So yeah, its game specific thing. GPU usage is at 40% while the cpu sits around 80. Funny that even Minecraft uses more of my gpu xD.Okay. that's good PSU model. No worries here. IDK what might be the issue here. What about other games apart from R6S ? How do they perform currently on your RIG ?
Have you also tried running some synthetic benchmarks on your system ? You can compare your scores with others having a similar RIG. It will give you some idea as well.