My RT620P is overheating in Far Cry 7 at max settings, will deep cleaning the fins actually restore performance?

During long sessions at max settings, I noticed the CPU temp slowly creeping from 70°C up to 88°C; that kind of gradual performance decay is incredibly noticeable over a few hours. The dense fin stack of the PCCOOLER RT620P had accumulated a massive amount of dust over six months, dropping the exhaust airflow from 3.2m/s to 2.0m/s. I first tried forcing the fans to 2200 RPM in the BIOS, but the noise was deafening and the temp stayed stuck around 85°C—brute force is useless against a physical blockage. I used compressed air for a deep clean of the fins and optimized the fro