I was removing the cooling system for cleaning and noticed a hole between the fan and the radiator on the GPU # 1 that disperses the air flow. It can solve easily by applying a trimming in PVC, or any other material, closing the hole, avoiding the dispersion of air. (Gain -4 ° C) Before After I also applied the heat sink directly on the block of the GPU and CPU. CPU (gain -2°C) GPU (gain -3°C) I also modified the backcover, by increasing the air flow (Gain -2 ° C) Have Fun!