Why is my GPU getting too hot in Crysis Remastered desert maps?

My GPU hit 82°C in the desert, causing major stutters. I was panicking. I tried adding more fans, but it made airflow chaotic and temps worse. I realized I needed better layout. Using GamePP Fan Curve Config, I set fans to front-in rear-out and raised speed from 800 to 1200 RPM. HWiNFO showed temps dropped to 68-72°C and case temps stabilized at 35-40°C. It fixed the thermal bottleneck perfectly.