This freezing/stuttering has been affecting me with an i5 9600k and RTX3060. rather than play with regedit I checked my power plan settings and nVidia control panel options for DCS Blackshark. Ensure power plan is set to high performance and the options for antialiasing and performance in nVidia control panel are set to application controlled and prefer high performance. I was using balanced power plan with default nVidia options for DCS - stutter hell every 5-10 secs!
DCS options.docx
I use vsync so fps caps at 60 for my 1080p monitor, but now butter smooth (and shows 150-185 theoretical fps). This using DLSS with SSS disabled and high options for most.