I have owned this particular iMac (2020 27” 5k) with 128GB of RAM (from OWC) since mid November.

Just recently, My iMac would freeze (or if I’m watching something like youtube or twitch, the audio would stutter and loop) for about 10 -15 seconds and then restarts.

The fan gets louder during the freeze also. I’ve reset my SMC, rebooted the computer in safe mode, and read somewhere that antivirus software messes with Apple stuff, so I deleted my Avast using AppCleaner. It seemed to work for a while, but the issue popped up a few days ago again.

I’m not sure if I have to re-install my OS or if the RAM could be the culprit. I’ve checked my activity monitor and I’m using like only a third of my RAM most of my time (I’m a storyboard artist and illustrator along with doing 2d animation).

I’ve an EtreCheck and this is what I got: EtreCheck Report