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Fractal Define R4 Best fan config + front fan choice

post #1 of 4
Thread Starter 
I thought of having following fan config:

2x 140mm intake front
140mm top (first vent) intake

140mm rear exhaust

And since Define R4 is designed to stop noise, i thought why not have 2x 140mm noiseblocker pro blacksilent pk3
Will there be alot of noise if i have those fans on front even with the door?
post #2 of 4
You;re going to get a pretty high positive pressure that way. Your only exhaust is going to be the rear fan whatever leaks out bottom and the side fan holes, assuming you have the one without the peekaboo plate.

The psu is not in the equation here, What I might do is do 3 exaust, 3 intake. 2 fron and one bottom (in front of the PSU) intake, and the back and top exhaust..
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post #3 of 4
Thread Starter 
Quote:
Originally Posted by bombastinator View Post

You;re going to get a pretty high positive pressure that way. Your only exhaust is going to be the rear fan whatever leaks out bottom and the side fan holes, assuming you have the one without the peekaboo plate.

The psu is not in the equation here, What I might do is do 3 exaust, 3 intake. 2 fron and one bottom (in front of the PSU) intake, and the back and top exhaust..
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.
Is there anything bad with having the fan setup i suggested?

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

vs Noctua
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.
Edited by Rar4f - 9/17/13 at 1:06pm
post #4 of 4
Quote:
Originally Posted by Rar4f View Post

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.
Quote:

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

vs Noctua
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.
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Crossover 30Q5 PRO 30" 2560X1600  cheapest piece of crud I could find antec HCG 750 some thermaltake microcenter blue-light-special... 
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