It's not getting nearly enough air, and running about 20 C over its max operating temperature on the spec sheet.

https://www.amazon.com/SCCCF-3x90mm-Graphic-Graphics-Cooler/dp/B09294VVTT

https://www.amazon.com/SiyuXinyi-Bracket-Compatible-Vertical-Supports/dp/B07VS6GVZX