Does size matter?

[Bounce]

I got these two fans I'm looking to install ;




One is a 120mm fan (NZXT Rifle bearing RF-AF12C-RB) the other is a 140mm fan (Cooler Master A14025-12CB-3BN-F1).

I'm looking at which are these two are the best ? I'm looking to use one of them to exhaust.

 

[Bounce]

Bigger size doesn't neccesarily mean better performance. Specifications are the key, even though they are only marginally helpful. Generally fans with higher pressure ratings at simialr airflow rating will perform better because higher pressure rating means fan can overcome resistance better .. and case grills, filters, cooler fins, even cabling are all resisting our fans' airflow.

RF-AF12C at full speed is rated:
63.02 CFM
1.24mm-H2O
31Db

A14025 at full speed is rated:
1200 RPM
60 CFM
19 DBA
Can't find any other specs.

Honestly, I wouldn't use either one

You can get a 2-pack of PH-F120MP for £14.99, so £7.50 each
https://www.overclockers.co.uk/search?ssearch=ph-f120mp

2-pack of ph-f140mp are out of stock at the moment, but when in stock are £16.26, so £8.13 each
https://www.overclockers.co.uk/two-...140mm-fan-radiator-performance-bu-003-pt.html

Thanks I did think that.

I should have mentioned my case is a NZXT H500 which has notorious problems with airflow (basically the front is completely enclosed off which restricts airflow into the case).

So the fan support options I have are :
1 Rear fan (120mm)
1 Top fan (which can support 120mm or 140mm)

The front has a fan cage which can support 2x 120mm or 2x 140mm fans, but as stated the front of the H500, is completely closed off so it doesn't make sense to install any fans at the front.


So I was thinking a 120mm fan for the rear and a 140mm for the top?

I was thinking the ;
Noctua NF-P14s redux-1500 PWM, High Performance Cooling Fan, 4-Pin, 1500 RPM for the top.

What do you think or could you recommend me something else?

 

[Bounce]

What Armageus said about front fans.

a couple of high pressure rated 140mm front intakes with all opening not covered by fans blocks will move quite a good airflow into case.

NF-P14s are not all that good. Phanteks PH-F140MP are better. AN-A14 iPPC 24v 3000rpm has same performance up to 1500rpm as NF-P14s redux 1500 PWM,. In below chart you can easily see at similar rpm and noise levels PH-F140MP is better.

Ok I see so the ph-f140mp will do 79.9cfm at 1500rpm whereas the noctua will do 76.8cfm at 1500rpm.

The ph-f140mp are out of stock any ideas when they will be back?

So am I right in thinking I need :
3x ph-f140mps

Two for front intake and one for top.
The rear can remain as a 120mm RF-AF12C?

How do the fans that armgeus compare to those ph-f140mps?

Also it says on the Phanteks website that the PH-F140mps have a max of 68cfm why does it say that when your table says 79.9cfm?

http://www.phanteks.com/PH-F140MP.html

 

[Bounce]

I wouldn't bother with the top exhaust, just a rear exhaust should be enough with the front intakes.

Arctic's specs say they are better than the Phantek's however as always take with a pinch of salt.
I personally own some however and can't fault them. They also come with a 10year warranty Vs 5 for the Phantek's fwiw.

Ah ok. Why not a top fan though? surely its best to exhaust as much hot air as you can?