I've been having this issue since a month after the PC was built.
Specs:
Ryzen 9 3900x
ROG Crosshair VIII Hero X570
ROG O8G RTX 2070
32 GB DDR4 3600 Gskill
Samsung 960 EVO 1TB
Corshair RX 750 PSU
Drivers:
Windows 10 64 bit Version 1903
Asus Version 436.30 Graphic
Asus version 1201 Motherboard
Temps:
CPU 50 at idle 60-70 under load
Graphics card 32 idle 50-70 depending on load
In anything I'm doing it'll stutter intermittently. My temps are fine and everything seems fine. I've gotten 2 new graphics cards from Asus RMA and sent in the motherboard and they sent it back. I have run DDU multiple times and installed the correct drivers for the graphics card. I've run a GTX 960 on it and it still stuttered. When I'm playing a game like CSGO it runs at around 300 fps but it'll drop to 20 fps and stutter at the same time, it does this with any steam game. When I play the new Modern Warfare it runs fine no problem. When using chrome or typing up something like this post it will randomly stutter. It's been occurring since last September and getting a new graphic card from the RMA fixed it for a month and then it started happening again, sent it in and they sent me another card and it didn't fix it. Used to have two hard drives on the system with windows 10 and my uncle suggested taking out the other since it could be having trouble with 2 different OS locations but removing one of the hard drives didn't work. Plz help.