I'm getting frequency fluctuations and FPS drops in complex stealth scenes in Hitman 3 with my AK500; how do I fix this?

Whenever I'm sneaking through a large crowd, my frame rate randomly dips from 120 down to 40, which feels incredibly jarring. I checked the sensors and found a massive temperature delta—the hottest core was 25℃ higher than the coolest, which is a clear sign that the DeepCool AK500 base wasn't making flat contact, creating a localized hot spot. I tried limiting the max boost clock via software, but that just cost me 15% overall performance without fixing the root cause. I ended up ripping the cooler off, applying high-performance liquid metal paste, and tightening the screws in a strict diagonal pattern. In the next stress test, the core delta shrank to 8℃ - 12℃, and the clock speeds stabilized at 4.5GHz - 4.7GHz instead of swinging between 3.2GHz - 4.8GHz. I actually applied too much liquid metal at first and it leaked over the edge, so I had to clean it all with isopropyl alcohol before I dared to boot. Full load temps now sit at 75℃ - 82℃. A 30-minute Cinebench run confirms temps are holding at 75℃ - 82℃.