> If i replace my exhaust fan with the intake fan would it mess up the cooling?
One main objective when planning chassis cooling
is to achieve, or approach, a balance between
intake CFM and exhaust CFM (cubic feet per minute).
It is possible to reverse the 120mm fan(s) on the H50,
but be sure that you feed enough cooler air through
your one intake fan.
Also, I just looked at Newegg's photos for your chassis:
if you have also installed a good PSU, with a large
intake fan pointing down, it too will be exhausting
warmer air coming off the rest of your system.
To keep things well balanced, using the CFM Balance goal,
you can find intake fans for empty PCI slots that will
also bring cooler air into the case interior, i.e.
from outside the rear panel.
Antec's Vcool is a very nice product for this purpose:
I would have to say that there are a googolplex number of
fans to choose from, but Google's "fan boys" might object
(not paying attention to the subtle spelling change above)
so let's say there are a quadzillion such fans to choose from