Extra case fan position help wanted

[KingUnicorn]

I'm planning to build a pc and to put an extra case fan in the case. This is my first build ever, so I am pretty new to this sorta stuff. I've chosen the case and the extra fan I will install, but I don't know weather to make it an intake or exaust fan. The case is a Thermaltake Chaser MK-I(or one, I never figured it out) and the fan is a Enermax T.B.SILENCE 120mm Red LED Case Fan. As I said I am new to pc building so any advice would be great.

[The Official Czex]

I'm planning to build a pc and to put an extra case fan in the case. This is my first build ever, so I am pretty new to this sorta stuff. I've chosen the case and the extra fan I will install, but I don't know weather to make it an intake or exaust fan. The case is a Thermaltake Chaser MK-I(or one, I never figured it out) and the fan is a Enermax T.B.SILENCE 120mm Red LED Case Fan. As I said I am new to pc building so any advice would be great.

 

You want positive pressure, so have more intake than exhaust.

[blackadder]

I'm planning to build a pc and to put an extra case fan in the case. This is my first build ever, so I am pretty new to this sorta stuff. I've chosen the case and the extra fan I will install, but I don't know weather to make it an intake or exaust fan. The case is a Thermaltake Chaser MK-I(or one, I never figured it out) and the fan is a Enermax T.B.SILENCE 120mm Red LED Case Fan. As I said I am new to pc building so any advice would be great.

where are you going to be putting it, if close to the front use it as intake if closer to the back then exhaust most likely 

[KingUnicorn]

The fan is gonna be a side fan. And as for positive over negative pressure, how would one calculate that?

[blackadder]

The fan is gonna be a side fan. And as for positive over negative pressure, how would one calculate that?

Either add up your fans, make negative prssure be negative sign and postive be postive then sum them and if you get a postive number you probably have positive pressure if the fans are similar size and rpm. Or you can do a 2nd order partial differential equation with the help of a beefy pc and software and fine out or use a gauge to find the pressure. The first one is the easiest, clearly. Anyways as long as you have air moving to replace the hot air your temps should be fine.

Side fans are normally exhaust because of location by the gpu.

[Silyy097]

The fan is gonna be a side fan. And as for positive over negative pressure, how would one calculate that?

More intake than outtakes = Positive, as air is being forced in.

More outtakes then intake = Negative, as air is being forced out.

[KingUnicorn]

It apears that every spec list I have found on the case only has the fan size, noise level, position in case (not orientation though), and rpm, so I'm just gonna try and put all I think is important and see if anyone can figure it out. For the rear fan, it's a 140 mm fan at 1000 rpm. The top fan is a 200 mm fan at 600-800 rpm. Same as the front fan. The extra fan does contain more info though. The spec list says it is a 120 mm fan that moves air at 53cfm and has a max pressure of 1.073 mm-H2O.

[wardude1]

just try it out and chose the one with the lowest temp

[rjfaber91]

More intake than outtakes = Positive, as air is being forced in.

More outtakes then intake = Negative, as air is being forced out.

 

Right up to the point that you have three 120mm pressure-optimised intakes and two 200mm airflow-optimised exhausts, just to name a scenario. Obviously you wouldn't have this particular thing going on in any system, but if the number of intake and exhaust fans are nearly the same, it is worth looking at how big the fans are and how much air they move.