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NF A14 PWM vs NF F12 PWM - Page 2

post #11 of 18
Quote:
Originally Posted by psyside View Post

Thanks guys, its still confusing to me, because on few tests i saw, NF A14 PWM on heatsink always beat out the NF A15 PWM.. they measured delta temps as well.

You will not see the A14 on most heatsinks, especially Noctua. The A14 has a square frame and will not fit in Noctua heatsinks.

 

Quote:
Originally Posted by psyside View Post

I know, that's why i want to know what would be best option, and its strange for me how you guys recommend the NF A15 PWM? redface.gif

We recommend the A15 because it is designed for heatsinks.

 

The A14 and the A15 have the same blade cluster (see here). Where they differ is their frames. You choose the application, then decide on A15 or A14 based on what frame you need. Simple.

 

And you get the PWM because it is PWM.

 

And you get the A15/A14 because it is the best fan. Or you get a TY-14x because it is nearly as good for a reasonable price.

 

I would put the Phanteks fans down with the P14 -- really good fans, but not up with the top two.

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post #12 of 18
Thread Starter 
A15 achieve +2c worst results compared to A14 PWM, tested on same heatsink with delta temps, but i cant find the results (links)

Anyway thanks alot for your help!
Edited by psyside - 4/11/14 at 1:47pm
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post #13 of 18
NF-A14 at 1200rpm (using L.N.A. performs exactly the same as NF-A15 does.. unless you have a NF-A15 that came with cooler. The NF-A15 supplied in cooler kits is a 1500rpm version and performs the same as NF-A14 at full speed. That's direct from Noctua. wink.gif

Deepor found this in NH-U14S manual there are two versions of A15
Quote:
Please note that while the NF-A15 fan included with NH-U14S runs at 1500rpm, Noctua recommends using the standard 1200rpm retal version as a rear fan in push/pull mode as the combination of 1500rpm at front and 1200rpm at the rear will provide the best balance of performance and acoustics.

If you would like to run both fans at same speed, please use the supplied Low-Noise Adaptor on the front fan to reduce the speed to 1200rpm.
See here, second page, middle column; "Adding a second fan": http://noctua.at/pdf/manuals/noctua_nh_u14s_manual_en.pdf

This is the reply I received from Noctua
Quote:
The NF-A15 fan used on the NH-D15 and the NH-U14S coolers are faster than the NF-A15 PWM available as a retail product. Since the NF-A14 and the NF-A15 use the same impeller and just differ by the frame, their specs are exactly the same at the same fan speed.

Kind regards,
Andreas Karner
Noctua support team
post #14 of 18
Thread Starter 
Ah that explains it now, thanks, that means that the NF A14 PWM is the best option if you want 14cm, and it should beat even the NF F12 right? thumb.gif
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post #15 of 18
Just stating the fans man. biggrin.gif

Which is better depends on application and personal preferences. tongue.gif
post #16 of 18

Note that they did the research and found the 1200 rpm is better as a pull fan than another 1500. I'm wondering: is that because 1500 > 1200 is better than 1500 > 1500, or is their 1200 rpm A15 better than any other fan available at retail?

 

Contracts do get in the way. I note that their NF-P14 PWM comes with an NH-D14 SE2011, but is unavailable otherwise. I have one because they sent me one to replicate the SE2011 for a review I did. But it came in a plastic shell, not a retail box. I think we can agree that PWM fans would be better than the current fans on a regular NH-D14. But they have continued with the non-PWM version.

 

Contracts, I think.


Edited by ehume - 4/12/14 at 2:43pm
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post #17 of 18
Quote:
Originally Posted by Mopar63 View Post

The reason for this is the 120mm fan has the air more focused than the 140mm fan. The biger fan moves more air but it is more spread out.

? Both of these are 140mm fans, neither are 120.
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post #18 of 18
Quote:
Originally Posted by ehume View Post

Note that they did the research and found the 1200 rpm is better as a pull fan than another 1500. I'm wondering: is that because 1500 > 1200 is better than 1500 > 1500, or is their 1200 rpm A15 better than any other fan available at retail?

The change in RPM could be due to the restriction of the heatsink, so the extra RPM isn't needed and is generating extra noise for nothing.
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