I've also got this issue with my new build pc, and yes it does kill my fps at the same time. All settings we set to max including the sound. Currently decreasing the settings until the issue stops.
system specs are
AMD FX 8350 8 core 4GHz
32GB Ram
NVIDIA GTX 1080Ti
Sound Blaster Z
HD is SSD with a couple of mechanical drives
Display BenQ XR3501 35" ultra widescreen 144Hz
Any help / suggestions would be appreciated.