Originally Posted by
churchy
JoeChuo: Not much people accept 2000rpm as silent enough, so probably that's the reason why not much people test rad performance above 1400-1700. With that fast fans as mentioned ones probably two stacked rad performance will rise more, maybe upto 1.5 times of single one. Don't know how high though. I see that already one of rads is very high finned one (GTS, 30FPI) and designed for high-rpm range fans, that's good. I hope three delta fan layers will be enough to effectively blow through with increased airflow restriction by rad stacking.