Just had to bump in with another tip Re : performance affect while recording
Also look at cpu utilization : fh2.exe + recording process
If your cpu has many cores + threads. Try change Cpu Affinity and seperate fh2.exe and nvidia background processes
nvidia files : Cpu Affinity CPU 0 & 1 ticked
fh2.exe : Cpu Affinity CPU 2,3,4... ticked