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The [Official] Noctua Club - Page 302

post #3011 of 3060
Quote:
Originally Posted by Darkbreeze View Post

So yeah, as Alpha C mentioned, the NF-A15 PWM Chromax fans themselves are actually a performance upgrade over the original baby squirt brown models.

The NF-A15 fans are spec'd at 1200 RPM and 67.9 CFM with 1.51 mm H₂O static pressure. The new Chromax versions are 1500 RPM, and 82.5 CFM with 2.08 mm H₂O static pressure making them spec'd the same as the higher performing NF-A14 fans. Noise levels are on par with the NF-A14 fans now though which is actually a slight increase from the standard NF-A15 PWM fans.

Having used an NF-A14 PWM fan on my NH-U14S heatsink for some time now I can tell you that they have excellent performance characteristics and are still extremely quiet even at full steam so this tradeoff doesn't bother me a bit. With a single NF-A14 PWM on my NH-U14S I easily stay below 68°C at all stages of Prime95 v26.6 with my 6700k even though it's clocked at 4.6Ghz.

The NF-A14 PWM Chromax fans are spec'd exactly the same as the original NF-A14 fans however as are the NF-A12 PWM fans.

5 degrees better than my u12s. What’s your voltage set to ?
post #3012 of 3060
Quote:
Originally Posted by Darkbreeze View Post

Black versions of the non-industrial fan series. FINALLYYYYYYYYYY!

http://noctua.at/en/noctua-introduces-chromax-line-fans-cables-and-heatsink-covers
Interesting how the USA price is 20% higher than EU price.
Quote:
Originally Posted by Darkbreeze View Post

Actually, after looking more closely, and I should have already known this but I've been away from things for about a year on a job that didn't really allow for internet access so I kind of got out of touch with the tech side of things for a while there, and forgot a good deal that I used to be in touch with on a daily basis, I realized that it does NOT have any performance advantages over the standard NF-A15 PWM. The 1200RPM spec given for the NF-A15 PWM is in consideration of using the low noise adapter. Without it, that fan too had the same specs as the NF-A14 PWM, so really the only difference is color.

For me, that's still enough to make it worthwhile though, because I've taken many NF-A14's and 15's, and colored them black using rattle can vinyl dye, and while they look good and still perform very well, you know there has to at least be SOME minimal performance differences due to the additional weight and drag on the fan blades from the surface layer of vinyl dye which is really just a specialized paint and we know paint diminishes fan performance to some degree in all cases.
I'll only add that these NF-A15 1500rpm Chromax are the only 1500rpm NF-A15 you can buy. The NF-A15 1500 only comes on coolers. The retail model NF-A15 is 1200rpm .

It will be interesting to see how much extra Noctua charges for black versus original baby poo brown. tongue.gif
post #3013 of 3060
Quote:
Originally Posted by doyll View Post

Interesting how the USA price is 20% higher than EU price.
I'll only add that these NF-A15 1500rpm Chromax are the only 1500rpm NF-A15 you can buy. The NF-A15 1500 only comes on coolers. The retail model NF-A15 is 1200rpm .

It will be interesting to see how much extra Noctua charges for black versus original baby poo brown. tongue.gif

They're actually charging more or less the same (vs the older ones) once you account for how much the Chromax corners cost on their own. They replaced the fan splitter & LNA (fan speed reduction cable / resistor) with colored corners...

It's $ 24.90 for 140mm size and $ 22.90 for 120mm
http://noctua.at/en/products/overview-noctua-product-lines


Corners are $6.95 for 16 (NF-F12 / NF-S12A / NF-A14 corners) https://www.amazon.com/Noctua-NA-SAVP1-Chromax-Anti-Vibration-Mount/dp/B018SOU3UG
http://www.performance-pcs.com/noctua-na-savp1-chromax-anti-vibration-pads-white.html#Specifications
Red is $4.45 https://www.amazon.com/Noctua-NA-SAVP1-Chromax-Anti-Vibration-Mount/dp/B018SOU4PK/

My issue with it is I'm not going to be using any red , yellow , blue, or green ... so all those corners are useless. I doubt anyone is going to be able to sell off the unused corners either since it probably costs more to mail them than they are worth. I just need black or white corners. If I could get a dual pack of 140mm Chromax fans in all black for say $35 MSRP it would be better. Having a fan splitter and/or the silicone fan screws would add cost, but if they could be included it would be great. Noctua could call it chromax.black without the chromax.black.swap branding.

The bare minimum I could see the fan selling for is around $12-15 MSRP without accessories. Each set of 8 corners retails about $2-3 alone (which is exceedingly high since they ought to be ~$1 at best).
Edited by AlphaC - 10/17/17 at 9:12am
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post #3014 of 3060
Quote:
Originally Posted by doyll View Post

I'll only add that these NF-A15 1500rpm Chromax are the only 1500rpm NF-A15 you can buy. The NF-A15 1500 only comes on coolers. The retail model NF-A15 is 1200rpm .

You're right. Guess I was wrong again. That's strange that the non-HSF models are a lower rpm than the HSF versions. I stand corrected. I was under the impression that the 1200rpm spec given on it's spec sheet was assuming use of the L.N.A. It's not, at least not on the non-HSF models. It is however on the new model and the HSF model.
Quote:
Low-Noise Adaptor
The NF-A15 PWM is supplied with a (L.N.A.) that reduces the maximum fan speed from 1200 to 900rpm. The L.N.A. can be used either to run the fan at a fixed speed of 900rpm or to cap the maximum speed when using automatic PWM control.
post #3015 of 3060
Quote:
Originally Posted by Darkbreeze View Post

You're right. Guess I was wrong again. That's strange that the non-HSF models are a lower rpm than the HSF versions. I stand corrected. I was under the impression that the 1200rpm spec given on it's spec sheet was assuming use of the L.N.A. It's not, at least not on the non-HSF models. It is however on the new model and the HSF model.
I didn't think you were wrong. I was only trying to make it clear that NF-A15 are 1200rpm unless supplied on coolers. Is LNA 7v or is it 9v?
post #3016 of 3060
According to what I'm seeing, the LNA is is 9v and full speed is 12v, because at full voltage they are 1200rpm and with LNA they are 900rpm. I took no offense, in fact, I'm glad you pointed it out. I'd rather KNOW than "be right", especially being a mod over at Tom's, because we know that most visitors tend to lend more weight to what we say, whether that's a good idea or not is another question. Regardless, I appreciate it because that way I don't spread misinformation along to other folks. So hats off for pointing that out.
post #3017 of 3060
Quote:
Originally Posted by Darkbreeze View Post

According to what I'm seeing, the LNA is is 9v and full speed is 12v, because at full voltage they are 1200rpm and with LNA they are 900rpm. I took no offense, in fact, I'm glad you pointed it out. I'd rather KNOW than "be right", especially being a mod over at Tom's, because we know that most visitors tend to lend more weight to what we say, whether that's a good idea or not is another question. Regardless, I appreciate it because that way I don't spread misinformation along to other folks. So hats off for pointing that out.
You were not wrong. You simply did not point out that NF-A15 supplied with coolers is 1500rpm while normal NF-A15 accessary fan is 1200rpm while new NF-A15 Chromax is 1500rpm.

FYI, Noctua says LNA lowers NF-A15 1500rpm fan to 1200rpm. Another bit of trivia is they suggest if using a 3rd fan on NH-D15 or D14 to use 1200rpm and also use thicker spacers to increase space between pull fan and cooler fins. My understanding is the thicker spacer makes up for the difference in impeller to cooler spacing that the fan's motor mounting frame braces supply to spacing between impeller and cooler when being used in push mode thus giving similar spacing from cooler fins to fan in when mounted in pull mode. Look at any fan and you will see there is more space between impeller to back of fan (where motor frame braces are) compared to space from impeller to front of fan. wink.gif
post #3018 of 3060
AFAIK :
LNA = 9V
ULNA = 7V
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post #3019 of 3060
Quote:
Originally Posted by AlphaC View Post

AFAIK :
LNA = 9V
ULNA = 7V
I think you are correct .. assuming 12 volt in. wink.gif
post #3020 of 3060
Quote:
Originally Posted by NewType88 View Post

5 degrees better than my u12s. What’s your voltage set to ?

1.325v
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