Stacking fans, does it do anything?

[MatsNorway]

So i have a need for a bit more air into my case.

 

The verdict seems to be that you get same volume, more pressue. Surely if you suck harder you move more air i wonder.. The inlet is after all the same size.

 

Does anyone have hans on experience or a video to link to?

[freeagent]

Buy good fans, don’t waste your time stacking.

[tkitch]

two fans directly on top of each other is bad, generally.

If the fans spin the same direction, they'll cause a fuckton of vibration and end up destroying each other.  

 

What fans do you have?  What case do you have?  (Otherwise, pics)

 

[thrasher_565]

servers use em mostly in 1 and 2 ,3 u height racks.

[darknessblade]

On 12/17/2021 at 4:17 AM, thrasher_565 said:

servers use em mostly in 1 and 2 ,3 u height racks.

In that case stacking is even worse, as server fans are Higher RPM, and do not have features like vibration dampers

[thrasher_565]

5 hours ago, darknessblade said:

In that case stacking is even worse, as server fans are Higher RPM, and do not have features like vibration dampers

server do not care about nose as the can reach ear shadering 70dbs.

 

the fans one fan gos one way and the other the other way.

 

now a days there probly lower power as thats a big thing now adays but back then 13amps per fan was not un common.

[Kinda Bottlenecked]

There are case fans designed that way but they are not your average pc fans. They're usually for industrial applications.

 

Here's an experimental video: 

 

[thrasher_565]

15 minutes ago, Kinda Bottlenecked said:

There are case fans designed that way but they are not your average pc fans. They're usually for industrial applications.

 

Here's an experimental video: 

 

that was a joke. may even be apr 1.

 

anyway a pc fan is not meant to be stacked un like a server fan. im guessing its the thickness of the fans that helps make it work well 25mm dose not.

 

but there are things called boosters that do indeed in cress the fans air, and sp. https://www.youtube.com/c/MajorHardware

 dose just that.

 

adding a shroud to the fan dose improve it but for the cost its not worth it. we did have up to 55mm fans at one point and 120mm thicc rads

 

30mm is the sweet spot.

 

 

Edited December 19, 2021 by thrasher_565

[MatsNorway]

On 12/16/2021 at 7:13 PM, freeagent said:

Buy good fans, don’t waste your time stacking.

I got all Noctuas.

3x 120mm NF12A or whatever.

1x 140

And a NH-15

 

I should probably have mentioned that i am running a 6900XT and a 5900X.. Toasty.. also got 4 x WD Red 8TB They add a few watts but most important, they might obstruct air a bit.

 

The GPU is not handling it if i push it. CPU runs fine even tho its on top of it all.

 

On 12/16/2021 at 7:44 PM, tkitch said:

two fans directly on top of each other is bad, generally.

If the fans spin the same direction, they'll cause a fuckton of vibration and end up destroying each other.  

 

What fans do you have?  What case do you have?  (Otherwise, pics)

 

Noctua did not advice against it, they simply said the kinda cryptic info; double the pressure but same flow. Given the mesh and sound trap on the Fractal Define R6 it sounds to me like i would get more flow by boosting the pressure.

 

I have space for one more fan in the bottom(PSU pit thing)  In theory i guess i got 2x in the bottom.. Cables makes that not very attractive unless someone got a fan mesh to run on top of them to keep cables out..

[freeagent]

1 hour ago, MatsNorway said:

I got all Noctuas.

55cfm.. That would bother me too.. my intakes are like 150cfm when they spool up. They are Noctua too, just not as quiet as yours

[thrasher_565]

2 hours ago, MatsNorway said:

I got all Noctuas.

3x 120mm NF12A or whatever.

1x 140

And a NH-15

 

I should probably have mentioned that i am running a 6900XT and a 5900X.. Toasty.. also got 4 x WD Red 8TB They add a few watts but most important, they might obstruct air a bit.

 

The GPU is not handling it if i push it. CPU runs fine even tho its on top of it all.

 

Noctua did not advice against it, they simply said the kinda cryptic info; double the pressure but same flow. Given the mesh and sound trap on the Fractal Define R6 it sounds to me like i would get more flow by boosting the pressure.

 

I have space for one more fan in the bottom(PSU pit thing)  In theory i guess i got 2x in the bottom.. Cables makes that not very attractive unless someone got a fan mesh to run on top of them to keep cables out..

what is the case?

[MatsNorway]

On 12/31/2021 at 2:04 PM, MatsNorway said:

Fractal Define R6

 

[thrasher_565]

11 hours ago, MatsNorway said:

 

oh my bad must have missed it.

 

https://noctua.at/en/axial-fans-in-series-or-parallel-operation

[MatsNorway]

So X is flow and Y is pressure?

Edit: they consider a tight mesh+sounds traps high resistance

[MatsNorway]

On 12/16/2021 at 7:44 PM, tkitch said:

two fans directly on top of each other is bad, generally.

Noctua confirms in the link provided by thrasher.

 

I guess that settles it, unless i get some serious spacing or a air flow straightener of sort i can not run series. Otherwise there is clear benefits on a Fractal Define R6 etc. So i guess radiator gang can sleep well knowing it gives a increase in performance.

[tkitch]

8 minutes ago, MatsNorway said:

Noctua confirms in the link provided by thrasher.

 

I guess that settles it, unless i get some serious spacing or a air flow straightener of sort i can not run series. Otherwise there is clear benefits on a Fractal Define R6 etc. So i guess radiator gang can sleep well knowing it gives a increase in performance.

an 'air straightener' is just a radiator, lol

 

[freeagent]

120x38s or 140x38s should solve all of your airflow and static pressure needs.

[MatsNorway]

On 1/6/2022 at 9:19 PM, tkitch said:

an 'air straightener' is just a radiator, lol

 

No, a radiators function is to cool liquid, and functions as an air straightener by having channels for cooling. Link to a product that solely functions to straighten the air below below.. "lol"

https://www.ebay.com/itm/263049772243?hash=item3d3efcfcd3:g:qWMAAOSwBkNcEXH6

On 1/6/2022 at 10:01 PM, freeagent said:

120x38s or 140x38s should solve all of your airflow and static pressure needs.

What is that? some super thicc fans?

[tkitch]

39 minutes ago, MatsNorway said:

No, a radiators function is to cool liquid, and functions as an air straightener by having channels for cooling. Link to a product that solely functions to straighten the air below below.. "lol"

https://www.ebay.com/itm/263049772243?hash=item3d3efcfcd3:g:qWMAAOSwBkNcEXH6

What is that? some super thicc fans?

A Rad also functions to straighten airflow.

Yeah, Delta 38mm thick fans (about 50% thicker than normal fans) are super high airflow, and also quasi-deafening, at well over 60 dba each