Originally Posted by legitlegit
Alright thanks for the response!
I'm not sure if my fans have enough static pressure from my fans , their nzxt ones but I already made a order for gt's, but their not coming till much later for some reason.
What would happen if there isn't enough static pressure
If there isnt enough static pressure in a push situation, where the fans are blowing into the fin array, the air "piles up" in front of the fins, slowing down and bleeding out of every gap possible before passing through the fins, including bleeding back through the fan blades themselves. If it is in a pull situation, the same happens in reverse: the fans are starved of air and due to the lowered pressure on that side, sucking in air from every small gap possible to try and even out the pressure difference. On top of that, the fans spin faster due to the lowered air resistance from the drop in pressure, which in turn create more noise.
With a fan with higher static pressure, it can force more air through dense fin arrays, delivering more cooling and preventing air from bleeding back through the blades. If the fans in question have broad fan blades as well as stator vanes immediately behind the blades, these help immensely in increasing static pressure. Its actually why jet engine compressors have stator vanes in the compressor case. They help boost pressure and greatly reduce air's tendency to flow the wrong way back towards the area of lowest pressure i.e the intake.
Just keep in mind, with few exceptions fans with stator vanes are noisy.