Hi, just built a new PC in the ”Corsair 4000D Airflow” case. I took out the from mounted 120mm fan though and added two 140mm fans from an old Fractal Design Define R5 case instead for a total of 3 fans (two intake fans in the front and one exhaust fan in the back). I’ve got two more Fractal Design fans though from and old ”Core 3300” case and wonder if it is adviced to have on or two exhaust fans mounted at the rop of the case aswell? I mean the temps are fine but if i have two fans just lying around and it would affect both the air pressure and temps in the case positively why not use them.