2 x 140mm or 3 x 120 mm

[CreepyNinja]

So i am buying a new computer (buy parts and build it) and i am going for the Corsair 780t case.
from the back there is a 140mm exhaust, and in front 2 140mm intakes. on the buttom i can put 2 120mm fans (i will do that) but i am not sure to make that a intake or a exhaust but i will probably go with an intake. i also want to hear your opinion. and on top i can put either 2 140mm or 3 120mm fans, whats better? and should i make them intakes or exhausts? and last question is: what should i to with front? change to 3x 120mm or leave it as it is. if you need some more info ask for it. i dont need any help with the fans i am going to buy. and i dont care about loudness when i am gaming, but care about silence when internet browsing or something like that.

thank very much for answers.

ps: sorry for bad english.

 

[madmatt30]

Leave the stock fans as they are & just add a single 140mm as a top rear exhaust.

Any more than that will offer very little extra cooling & just create noise for nothing.

2x140mm intakes & 2x140mm exhausts is ample case cooling for just about any system.

 

[Zerk2012]

Intake, front botton and side.
Exhaust, top back.
I would leave the front 140mm's
Filling the case with fans don't mean better cooling.
I would add 1 bottom fan and a 140mm in the top back spot. That would give you a bit of positive pressure and should be plenty of airflow.

 

[geofelt]

Try the stock arrangement first.
It is easy to change things out later if you need to.
Two 140mm have have about the same airflow as 3 120mm fans.
Plus, they tend to be quieter.

What will you have inside that you need to cool?
Generally two 140mm fans can deliver sufficient airflow for an overclocked modern cpu as well as a modern card like a GTX1080ti.
Try it first. If you really need more airflow, replace the two front 140mm intakes with noctua NF-A-14 3000 rpm fans.

Do not add any extra fans if you can avoid it.
All the air that comes in the front will exit somewhere, taking heat with it.
As a plus, if all the intake is filtered, you will have a cleaner case.
Adding extra exhaust fans tends to draw in unfiltered air from adjacent openings resulting in dust accumulation.
The single 140mm rear exhaust fan is fine.
Such a setup is fine for an air cooler.
Noctua NH-D15s is the best for a highly overclocked spu.

 

[CreepyNinja]

First i need to thank for all answers.

I am going with an i5 8600k which i want to overclock as much as possible. I will also be putting a GTX 1080ti in in the rig. And by the way i was already going with the Noctua NH-D15.
I will go with one at the bottom and 1 up.

Thanks again for the answers, helped pretty much

 

[geofelt]

First i need to thank for all answers.

I am going with an i5 8600k which i want to overclock as much as possible. I will also be putting a GTX 1080ti in in the rig. And by the way i was already going with the Noctua NH-D15.
I will go with one at the bottom and 1 up.

Thanks again for the answers, helped pretty much

I might suggest the revised noctua NH-D15s instead.
The s variants have been redesigned to clear tall ram heatsinks, but they are also offset a touch to insure clearance for graphics cards mounted in the first pcie x16 slot.

FWIW, My setup is similar.
I have a GTX1080ti.
My 8600K runs at 4.7 and will go higher.
It is so good that I need no more.
Looking at hwmonitor, the top temperature after a week of running is 69c.
Using a NH-D15s.
This is with a single front 180mm fan running on low speed and a 120mm exit fan.
It is deadly quiet.
Because of the positive pressure cooling setup. I clean my filter perhaps quarterly or less.
The parts inside stay clean.
Adding extra fans as you propose will disturb the cleaning action by drawing in unfiltered air from adjacent openings.
Try the stock arrangement first; you can always change later.

 

[CreepyNinja]

When i bought/ build my first computer (4 years ago) i got the Sharkoon BD28 case. Back then i had a FX8350 and a R9 390. First i used the standard cooling 2 120mm fans (1 front 1 back) and it even strugled without overclocking. I know that the Sharkoon was a much worse case (and had worse cooling) but i am still woried if you know what i mean.

I will buy the 2 extra fans, but first i will try the rig without them and if it runs good i will sell them. I think thats the best solutiuon. Thanks anyways

 

[geofelt]

Your $.
But, would it not be easier to try first, then avoid the hassle/loss if you need to sell the extra fans.

And... if it turns out that you need added incoming air, replace the front fans with the noctua AF14 3000 rpm fans.

 

[Zerk2012]

Adding extra fans as you propose will disturb the cleaning action by drawing in unfiltered air from adjacent openings.

That is wrong information the case has filters for the bottom fan also so it is filtered.
2X140mm front and 1x 120m bottom (intake) with 1X140mm back and 1X140mm top back (exhaust) is still positive pressure keeping all the incoming air filtered.

 

[geofelt]

Adding extra fans as you propose will disturb the cleaning action by drawing in unfiltered air from adjacent openings.

That is wrong information the case has filters for the bottom fan also so it is filtered.
2X140mm front and 1x 120m bottom (intake) with 1X140mm back and 1X140mm top back (exhaust) is still positive pressure keeping all the incoming air filtered.

Good point.
I was thinking of extra exhaust fans.
If all the intakes are filtered, that is ok.

 

[Zerk2012]

For the cooler if looks mater I would look at this cooler I think looks better, you can buy different color covers, 0 memory clearance issues (you can see all 4 memory slots) performs close to the D15 about 3C difference.
http://www.cryorig.com/r1-universal_us.php

https://imagescdn.tweaktown.com/content/7/0/7039_27_cryorig-r1-universal-cpu-cooler-review.png

 

[CreepyNinja]

I will anyways buy the extra fans, I don’t care that much about money (my PC will cost over 2,5k so that’s not cheap)

And to be honest I like the look of the Noctua more (I don’t like small arms of the fan if you know what I mean)