My Valkyrie V360 LOKI pump is screaming in WoW crowded cities. How do I stop the noise?

Whenever I was hanging out in Orgrimmar or Stormwind, there was this piercing high-frequency whine that was just unbearable in a quiet room. The Valkyrie V360 pump was running at a constant 3000 RPM, creating a resonance with the case that hit 42-48 decibels. I tried lowering the fan speeds first, but the pump was still screaming—that's when I realized the pump speed was the culprit. I went into the BIOS and switched the pump header from 'Full Speed' to PWM mode, capping the pump at 2000 RPM for anything under 65℃. My decibel meter showed a drop from 45dB to about 30-34dB, and the CPU temp only climbed slightly from 62℃ to 66-70℃. It's a massive upgrade in comfort. I did notice a tiny bit of stuttering when I first lowered the speed because the coolant warmed up too fast, but I fixed that by bumping the radiator fans to 1100 RPM. The coolant now stays between 36-40℃, and the noise is basically gone.