Hi, i had the same Problem. Also X470 with 3600X 16Gb Ram with CL16 @ 3600 Mhz and RTX 2070 Super
First I did the complete software route:
Windows Update 1909 de/installed
Chipset Driver de/installed
Realtek Driver de/installed
And all combinations above, nothing changed.
The culprit in my case was a CD/DVD Drive which was plugged into SATA but not to power. Somehow this caused my micro stutter. I disconnected the device from my Motherboard. The Problem disappeared.
My Suggestion, reset all connections in your PC. Check. If this does not help. Remove connected devices one after the other and check every time if the Problem persists.