The RV04’s airflow path has been optimized using positive pressure design to dissipate heat. The two front 180mm fan will provide equal airflow for both CPU and graphic card
area. From our test results, a rear exhaust fan creates an imbalanced airflow that lowers the CPU temperature slightly at the cost of greater cooling performance loss for the graphics
card area. Even without an exhaust fan installed the hot air will still exit naturally from the rear. We have also found out through testing that installing a fan directly onto the CPU cooler
results in overall quieter case compared to having a fan mounted in the rear exhaust fan slot due the latter’s more exposed location and turbulence against the fan grille. So with all
things considered, an exhaust fan is unnecessary with this case’s design, but the rear fan mount is still included for convenient placement of all-in-one liquid cooling solution.