Why does No Rest for the Wicked throttle on Valkyrie V360 Lite after long sessions?

The temperature hit 85℃, triggering throttling and frame drops. I tried setting the fan to 100%, but the noise was unbearable and it only dropped the temp by 2℃. I then used GamePP Fan Curve Config to start fan acceleration at 70℃ and replaced the thermal paste. AIDA64 stress test showed core temperature dropped from 85℃ to 72℃. Fan speed was maintained at 1500-1800 RPM per AIDA64. This smart adjustment allowed me to switch to a much more efficient cooling profile.