My Peerless Assassin 140 is hitting thermal saturation and throttling in Horizon Forbidden West, how do I stop this lag?

I was exploring the jungle smoothly until these tiny, annoying hitches started appearing, which told me my CPU was slamming into the thermal wall. The Thermalright PA140 was struggling with bursty high-power loads; due to uneven mounting pressure, I noticed a massive 15℃ delta between Core 1 and Core 3. My first instinct was to use a power-saving mode to cool things down, but my FPS plummeted from 110 to 75, which was a complete non-starter. I ended up ripping the cooler off, applying a high-conductivity phase-change pad, and recalibrating the bracket tension to ensure perfectly even pressure. In AIDA64, peak temps dropped from a scary 92℃ to a manageable 76-82℃, and the frequency dips vanished. I actually messed up the first phase-change application by putting too much on, which ironically raised temps by 4℃ until I cleaned it with isopropyl alcohol and applied a thin layer. CPU temps now hover at 68-75℃ with fans at 1500 RPM. Stress tests confirm the heat transfer is finally sorted.