Question Frame drops and stuttering in most games, plus screen artefacts ?

Sep 30, 2023
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Specs:
Ryzen 7 3700X
RTX 3070
32GB DDR4 3200MHZ RAM
650W PSU


Issue: During gameplay of most of my games, the game stutters and drops to 1FPS. The game then suddenly speeds up and then slows down to return to the normal framerate. This happens every 5 minutes or so. Using a hardware monitor, It says that the CPU usage drops to 0% during these frame drops. I have tried installing new drivers, turning off shadowplay and game mode, although none of these have worked. Help would be much appreciated

I am using a Biostar B550MH Motherboard and the stock AMD Wraith cooler. I have not monitored the temperatures. The games I have tested were on two different SSDs, NVMe and SATA and they both suffered from the same problem. Chipset and GPU drivers, BIOS are all up to date.

My GPU also throws up black artefacts on my monitor, they are clusters of multiple squares. These might be related. Any fix?