120mm Radiator paired with 120mm fan vs 140mm fan?

[Tonberry]

Hi all..

 

I have an idea to pair 120mm radiator with 140mm fan. How well it will work compared to 120mm rad with 120mm fan. I plan to use EK Coolstream SE 120mm with NF-A15.

 

The order will be EK SE 120 | case frame | NF-A15

 

I don't have the entire components for this build yet but I will get them all, and I'm curious about how well to use NF-A15 which is a 140mm fan with 120mm mounting holes to be paired with 120mm rad and restrictive case frame between them.

 

What do you guys think?

[SkilledRebuilds]

Something I saw last week you just reminded me of. May as well share it.

Good luck with your Endeavours.

 

[Tonberry]

15 minutes ago, SkilledRebuilds said:

Something I saw last week you just reminded me of. May as well share it.

Good luck with your Endeavours.

 

 

I actually inspired by this, but cant find any info or explanations about it.

I found it in imgur, only this pic without any link or captions.

 

[SkilledRebuilds]

I tend to think the pressure losses are not going to help forcing air thru the fins...

 

But if it works, less as good as normal but good enough.without crashing on temps. then GG.

[Tonberry]

10 minutes ago, SkilledRebuilds said:

I tend to think the pressure losses are not going to help forcing air thru the fins...

 

But if it works, less as good as normal but good enough.without crashing on temps. then GG.

you are right, the pressure loss might hurt the effectiveness. I have NF-A15 and some 120mm fans already to test this, but I want to get some early info before I get the other components to do the actual test, and to save some time and minimize the hassle. Thanks anyway..

 

I'm hoping a more silent build from this idea than using a 120mm fan.

[WoodenMarker]

The system is by u/SawInDream from reddit. Full album here: https://imgur.com/gallery/OJ53uST

GamersNexus has a similar example here with 200mm case fans: https://www.gamersnexus.net/guides/3084-cooler-master-h500p-radiator-placement-guide

I think using a larger fan works well from the original example where it's effectively acting as an air intake where the would otherwise be no fan. I don't think it's better than just using 120mm fans that may be better sealed against the rad though. 

[Tonberry]

1 hour ago, WoodenMarker said:

The system is by u/SawInDream from reddit. Full album here: https://imgur.com/gallery/OJ53uST

That is the link I found the pic from, but there is no info. Could you please share me the reddit link to see if there is explanation about it there?

 

He use 140mm at the bottom, 120mm fan on the bottom rad, and slim 120mm on the lower front rad. Wonder how effective it is..

[WoodenMarker]

7 minutes ago, PotatoCanDo! said:

That is the link I found the pic from, but there is no info. Could you please share me the reddit link to see if there is explanation about it there?

He use 140mm at the bottom, 120mm fan on the bottom rad, and slim 120mm on the lower front rad. Wonder how effective it is..

https://www.reddit.com/r/sffpc/comments/atyi2g/a_little_tall_for_an_sff_pc_phanteks_evolv_shift/

[For Science!]

2 hours ago, PotatoCanDo! said:

 

Don't forget also that as you make the fans larger, the central hub also gets larger, and there is absolutely no airflow in this region. So if you were planning to put a large fan directly onto a radiator, you actually get less of the radiator receiving active airflow from the fans. But as you saw, distancing the fan from the radiator is lossy for pressure and will also hurt.

 

But this is also why a good 120 mm fan can outperform a 140 mm fan on a 140 mm radiator with the right gasket, since the highest airflow is around the periphery of the fan anyway.

[Tonberry]

32 minutes ago, For Science! said:

But this is also why a good 120 mm fan can outperform a 140 mm fan on a 140 mm radiator with the right gasket, since the highest airflow is around the periphery of the fan anyway.

Oh, I never know about this. So do you think I should stay with 120mm fan for the rad?

 

I have NF-F12, but I could get NF-A12x25 or EK Vardar EVO, which of these 3 could give me a better output for rad behind case frame?

[For Science!]

Just now, PotatoCanDo! said:

 

I think easily NF-A12x25 for noise normalized performance

[Tonberry]

Just now, For Science! said:

I think easily NF-A12x25 for noise normalized performance

Right...

 

Thanks!

 

Move on to the build!

[Blai5e]

On 9/8/2019 at 1:42 PM, PotatoCanDo! said:

Hi all..

 

I have an idea to pair 120mm radiator with 140mm fan. How well it will work compared to 120mm rad with 120mm fan. I plan to use EK Coolstream SE 120mm with NF-A15.

 

The order will be EK SE 120 | case frame | NF-A15

 

I don't have the entire components for this build yet but I will get them all, and I'm curious about how well to use NF-A15 which is a 140mm fan with 120mm mounting holes to be paired with 120mm rad and restrictive case frame between them.

 

What do you guys think?

You could use a140mm to 120mm adapter like the Bgears 2 Pieces Pack Cooling Fan Adapter 140mm Black on Amazon. I used one once when I had to mount a 120mm rad in the top of an old Lian Li case that was replacing a 140mm fan.