My CPU is hitting critical throttling limits during multi-player raids in Granblue Fantasy: Relink with an AK620, how do I fix this?

Whenever I unleashed big flashy ultimates, the frame rate would dip from 144 FPS to 110 FPS. It's a tiny fluctuation, but in an action game, it feels glitchy and distracting. I checked the hardware and found the AK620 was idling around 82℃, which is right on the edge of the motherboard's light throttling threshold. I tried lowering the in-game effects, but the visual loss was too much, and I didn't want to compromise the aesthetics. Instead, I went into the BIOS and moved the fan trigger from 60℃ down to 50℃, and pushed the 100% speed point from 80℃ down to 70℃. In the RivaTuner frame time graph, those tiny latency spikes completely vanished, with frame times stabilizing between 6.5-8.8ms. After the first tweak, the fans were ramping up and down constantly during idle, but adding a 5℃ hysteresis interval made them quiet again. CPU temps now sit between 65-72℃. 3DMark stress tests pass perfectly, though the AK620 is definitely pushing its limits here.