ok, i was just wondering why people were saying to set the fan to pull the air through..
i thought that it was better to have the fan blowing down on it.
and as far as the pressure, i dont think that you are going to be able to create a high enough pressure to actually raise the temps....it is much easier to remove enough pressure out of the case to raise temps tho...i have dont that.
i have never raised the pressure enough to make the tmep go up...only down.
you would need to construct your case like a compressor to make it buid up enough pressure to outweigh the ammount of cool air being pushed into the case.
it is best to have it even...but then you need to direct the airflow...by sealing holes, and putting two identical fans, one blowing in, and one blowing out..(ideally bottom front in, top back out)
if you dont seal up the holes in the case, then the air will escape, and the air pressure will be more negative.
think about it...
lets say you have a 120mm fan in the front.
and a 120mm fan on the back.
but there are holes all over the place where air pressure is leaking out...and in, but you also have that 120mm fan pulling air out...it would not be that much, but to get the optimal air circulation, you would want to seal up holes. and remove the pre-fabbed holes that they put on the back of the case. and use one of those grills, or nothing at all, just watch out for the blades.
and for the front, the same thing...as little resistance as possible.
but i think that i would rather have a higher pressure in my case, since that has been what i had the best cooling performance with.
maybe you have had better results with negative pressure...but i have had better performance with positive.
also, i havent sealed up my case..i just have the 120mm fan bringing the air in on the side, and my psu fan pulling the hot air out the back.
seems to work for me, since my computer never hits a system temp over 30*C...
and my room can get pretty warm.
right now...it is at 28*C...but i am not doing much...you know...winamp, IE explorer, the usual things running.
yeah, i remember all that stuff from chemistry class, but it doesnt really apply unless you have a real high pressure in your case, which is pretty much impossible with the way case fans are made.
they arent like a sealed impellar or a piston that you would use on a compressor...
-DAvid
-Live, Learn, then build your own computer!-