Remove the CPU from the motherboard by raising the retention arm. Lay the CPU carefully on a soft surface to avoid damaging him by deforming some pins.
Mount two 120 mm type case fans on top of the case as an addition to exhausting hot air. You need at least four screws (two for each fan mounting diagonally) to mount the fans. (I recommend eight screws.)
This process improves the airflow inside the case because the heat generated by the CPU and the GPU will dissipate faster.
Run the system and check for its cooling performance. When your system is on heavy workload, you can increase the fan speed of either the CPU or GPU for better heat dissipation.
Check the temperature of your CPU and increase the cooler fan speed by using SpeedFan.
Check your GPU temperature and increase the fan speed by using MSI Afterburner.