I'm getting micro-stutters during city loading in Like a Dragon: Ishin! due to unstable pump speeds on my V360 MIST. How do I fix this?

The game would just freeze for about 0.5 seconds, which is a total nightmare during fast-paced combat. Checking the logs, the Valkyrie V360 MIST pump was bouncing between 2000 RPM and 3000 RPM in auto mode, causing core temps to swing wildly from 62℃ to 78℃. I tried lowering the shadow quality, which gained me 5 FPS but did absolutely nothing for the stutters—a complete waste of time. I headed into the BIOS, switched the pump header from 'Auto' to 'Full Speed', and locked the radiator fans at 1500 RPM. HWiNFO showed the temp variance shrinking from 16℃ down to just 3-5℃, and the frame time graph finally turned into a flat line. I did notice a slight humming resonance at first, but tightening the radiator brackets killed the vibration. Coolant temps are now stable at 32-36℃ with cores at 65-70℃. After a four-hour burn-in, everything is stable, and RAM temps are holding at 52-56℃.