Getting thermal spikes while driving fast in Days Gone on a V360 MIST, can process priority fix this?

This AIO felt like it was trying to cool my CPU with lukewarm water. In the open world of Days Gone, my core temps were bouncing between 70 and 90 degrees, which is just pathetic. The 'smart' pump mode on the Valkyrie V360 MIST has a 2-3 second lag when responding to power spikes, creating local hotspots and causing 10-15ms of frame time jitter. I tried undervolting the CPU, but my minimums tanked to 40 FPS—a total waste of time. I eventually went into the motherboard utility and forced the pump to 100% constant speed and switched the radiator fans to a linear curve. The RTSS graph went from a jagged mess to a smooth 12-16ms line. I had to deal with a slight high-pitched whine from the pump, but adjusting the case fan phases made it bearable. CPU temps stabilized at 65-71℃ and coolant stayed at 32-38℃. Exported logs show fans steady at 1400-1600 RPM.