Originally Posted by Rar4f
I don't plan on installing fans everywhere. Only 4 fans (to begin with).
Plus i thought if PSU is exhausting air at bottom, that adding a intake fan next to it may result in some of the hot air being inhaled back in.
Good point, though it will likely happen anyway unless you put an exaust there too, or keep the positive pressure high, like I suppose you are doing.
There are good things about positive pressure cases, namely dust control. Fans are easy to move about even in a put together machine, so I suppose you could just try it. You could then rent an infared thermometer at your local tool rental for maybe 10 bucks or so, and find out if you;re case temps are evil. If not you're good to go. There are so many holes in that thing I suspect it may be difficult to even achieve positive pressure in any meaningful way.
I am thinking maybe have 2x Noiseblocker blackpro PK 3 at front intake OR Noctua NF- A14 FLX 140mm
And possible have rear and top-rear as exhaust with 140mm r2 silent stock fans that come with case
140mm r2 silent has around 52 cfm at lowest
So thats 2x 52 = 104 cfm
88x2 with ULNA = 176 cfm
running at max speed.
And if we remove 30 cfm (just a number) to take into account dust filters and other air factors:
Then its 146 cfm vs 104 cfm.
To me that seems to be decent, but i dunnu what your thinking of with PSU.
Some cases pull psu air from inside the case and must be factored in. Yours doesn;t so it doesn;t matter, except for that air reentry thing you mentioned.
As general rule, unless my case fans are complete crap (antec 300 for example) you might as well burn em out before bothering with more. If you put on fans that are too big you'll just have to speed control them down again to deal wit the noise increase. Your case comes with filters so one would assume they were taken into account when the fans were sized.