Originally posted by: Mik3y
the front intake is not very important. it's the least effective fan slot, even though it does help in air flow a bit. that's why many cases dont include a front fan.
Yes and No to that statement.It really depends on the case design.Cold air should be forced in from low since that is where the coldest air is in your environment(room) and expelled out the top.Your PSU usually is located at the top and most supplemental case exhaust fans are usually located right under it.That gives you 2 exhuast fans already.If they're both 120mm then you're already pushing out quite a bit of air.Sufficient for most applications.An additional front intake fan allows cold air to be directe into the case and then taken up by the inner HSF's of your CPU,GPU(vidcard),active MB-chip HSF if applicable,and also usually helps cool the HD's wich are traditionally located behind hte front intake fan slot or nearby.
That cold air gets directed towards those HSF's and the PSU/exhaust fan from the bottom front of the case.
Preferably you'd have an airtight case with only the intake/exhaust fans as openings/exits for air to flow in/out of.That would really maximize the entire effect.
In usual traditional cases available that is not an option though.Air get's drawn in from the easiest and closest entrances(cracks and crevices) of your case and also hot expelled air from your components and their respective HSF's get's recirculated,unwantingly.
Hence it is better to opt for forced air induction by way of a front bottom intake fan.This way you have more control over what air is introduced into the case.Hence improved cooling.
The idea of sealing off all the cracks nad crevices other than your intake/exhaust areas is a good one.Air would then have no option other than to flow in the direction and take the path you want it to.Not to mention the overall silencing effect being a benefit.
It's simple physics.
So add a front fan and seal off those holes in the sides of that case.That should make a bit of a difference.
Maybe use some Aluminum foil taped in behind the logo holes inside the side panels?Or a couple layers even to improve silencing.Too bad you already have that hole on top now though.