Originally Posted by KennyHJK
So in the case of too much intake over outtake, I assume changing to a more powerful exhaust fan will eliminate the noise?
You'd have the chance to, as there won't nearly be as much pressure bearing down on the exhaust fan as it'll be able to pull more air out of your case. However, there is still a highly likely chance of you unbalancing that rear fan with as much intake as you plan on doing.
My rule of thumb is at least 1 more intake over outtake. That way you have positive pressure inside of your case to prevent dust buildup, and you'll also not be putting too much pressure on your exhaust fan to actually unbalance it.