Why are my CPU core temperatures uneven in GoW?

In God of War Ragnarok's magic scenes, my Jonsbo CR-3000E showed a 15°C temperature difference between cores. I re-applied thermal paste, which reduced the difference slightly but hotspots remained. Using the GamePP Hardware Sensor page, I identified poor contact and reinstalled the cooler with optimal pressure. I adjusted the fan orientation to ensure even heat dissipation. Temperature distribution verification showed the core difference reduced to within 5°C, stabilizing at 3°C after secondary cleaning.