How do I fix VRM heat spikes and frame drops in Nightingale?

When loading alien maps, I saw the MSI VRM hit 85°C, causing 12-18ms frame stutters. I tried adding a heatsink, but it failed. Using GamePP, I remapped the fan curve to 1800 RPM at 80°C. AIDA64 confirmed core temps dropped to 72-78°C and power stabilized at 128-145A, saving my immersion.