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NH-D15 - Page 2

post #11 of 31
Quote:
Originally Posted by doyll View Post

Specification differences are significant:
NH-D15(with fans) = 165x150x161mm(H,W,D), 1320g, 2x NF-A15 PWM 1500rpm 140,2 m³/h 24.6dBA
NH-D14(with fans) = 160x140x151mm(), 1070g, NF-P14 / NF-P12 1200/1300rpm 110,3 / 92,3 m³/h 19,6 / 19,8dB(A

NH-D15 is 5x10x10mm bigger; 250g heavier; 200/300rpm faster; 40m³/h more air (guessing) and is almost 5dBA louder at full speed

You do realize that the NH-D14 came with the old fans that used the first SSO-bearing and were not PWM? The NH-D15 comes with two NH-A15 fans that are second generation SSO2-bearing and are PWM. While these fans are larger than the fans on the NH-D14, they will be much quieter because of the SSO2 bearing. I highly doubt Noctua would release the NH-D15 and make it louder than the NH-D14. The NH-D15 should theoretically be much quieter than the NH-D14 but we'll see I guess.
post #12 of 31
Lets hope some sites reviews the NH-D15 vs Silverarrow IBE.
Quote:
Originally Posted by Capt View Post

You do realize that the NH-D14 came with the old fans that used the first SSO-bearing and were not PWM? The NH-D15 comes with two NH-A15 fans that are second generation SSO2-bearing and are PWM. While these fans are larger than the fans on the NH-D14, they will be much quieter because of the SSO2 bearing. I highly doubt Noctua would release the NH-D15 and make it louder than the NH-D14. The NH-D15 should theoretically be much quieter than the NH-D14 but we'll see I guess.
Noise is something very relative to each, even if its measurable, the sonic signature of each fan is different, and thus not always bigger and newers is better. SPCR has reviewed many of the newer noctuas and they still prefer the old signature sound of the Noctua NF-P14 FLX, i leave the review in case you are interested, First 140 mm Fan Roundup: Noctua, Phanteks, Xigmatek
Quote:
The A15 has a smoother acoustic profile than the A14 but both sound fairly good to the ears. However, they share the misfortune of living in the shadow of the P14. The A15 and A14 have a rougher, muddier sound and neither is worthy of being a true successor.

PWM fans are not better or worst than 3pin voltage controlled fans, its just another way to control fans, and even then they have to be developed and perfected, today most of the quiet fans are not PWM, but i do expect in the years to come that we will see better PWM fans, and probably reaching the best in charts, just we are not there yet.

But not all is bad though, Noctua has the best PWM range of control in the market for someone looking for a wide range of operation, not that many PWM fans can drop below 300rpms, where most of the new noctuas can, specially for someone looking to build a very quiet setup by driven their fans to inaudible levels, the biggest problem is needing higher rpms, where noctuas sonic siganture is not the best, but then again everything is relative to each user.
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post #13 of 31
Thread Starter 

Meh. False doctrine. I have in basement P14's, A14's and A15's. I reviewed the A-series fans for Vortez. I also had a chance to decide on P14 vs A15 for my own rig.

 

Given the choice, it's not even close: the A14/A15 blade wins. That's what I put in my rig. Actually, that is not surprising. As I show in my review, the A14/A15 blades look a lot like the TY series. (They may even share the same ODM.)

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post #14 of 31
Quote:
Originally Posted by Capt View Post

Quote:
Originally Posted by doyll View Post

Specification differences are significant:
NH-D15(with fans) = 165x150x161mm(H,W,D), 1320g, 2x NF-A15 PWM 1500rpm 140,2 m³/h 24.6dBA
NH-D14(with fans) = 160x140x151mm(), 1070g, NF-P14 / NF-P12 1200/1300rpm 110,3 / 92,3 m³/h 19,6 / 19,8dB(A

NH-D15 is 5x10x10mm bigger; 250g heavier; 200/300rpm faster; 40m³/h more air (guessing) and is almost 5dBA louder at full speed

You do realize that the NH-D14 came with the old fans that used the first SSO-bearing and were not PWM? The NH-D15 comes with two NH-A15 fans that are second generation SSO2-bearing and are PWM. While these fans are larger than the fans on the NH-D14, they will be much quieter because of the SSO2 bearing. I highly doubt Noctua would release the NH-D15 and make it louder than the NH-D14. The NH-D15 should theoretically be much quieter than the NH-D14 but we'll see I guess.

I'm not even sure Noctua got the fan specs right for the D15. The specs appear to be for the A14, not A15.

NH-D15 Cooler fan specs:
NF-A15 PWM 1500rpm 140,2 m³/h 24.6dBA

Fan specs:
NF-A14 1500rpm 140,2 m³/h 24.6dBA
NF-A15 1200rpm 115,5 m³/h 19.2dBA

See why I'm wondering?
post #15 of 31
Quote:
Originally Posted by Abula View Post


I have two NF-P14 FLX and one NF-A15 and the NF-A15 seems to be much better to me. When increasing speeds, the NF-P14 starts getting annoying a lot earlier than the NF-A15.
post #16 of 31
@doyll:

There's two different NF-A15. The ones you get with the coolers (NH-U14S) are 1500 RPM. The one you buy separately is 1200 RPM for some reason. I have no idea why it's like that, but it's not a mistake.
post #17 of 31
I'm guessing the NF-A15s that come with the NH-D15 might just be slightly tweaked regular NF-A15 (higher RPM, m³/h etc).
post #18 of 31
Quote:
Originally Posted by deepor View Post

@doyll:

There's two different NF-A15. The ones you get with the coolers (NH-U14S) are 1500 RPM. The one you buy separately is 1200 RPM for some reason. I have no idea why it's like that, but it's not a mistake.
Thanks for that info. thumb.gif
Have you actually used both or is this based on posted specs?

Totally stupid if it's not a mistake! mad.gif
Even more eso ifi is a mistake! rolleyes.gif :mad:They've had plenty of time to correct it.
No logical reason for same name/model number to be on different fans! mad.gif
Could at least add a lower case letter on the end! mad.gif Barstewards!!! mad.gif

I'm putting a Noctua logo on my dart board! tongue.gif

Edit:
Feel much better now with darts stink in their logo. biggrin.gif
Edited by doyll - 4/9/14 at 7:07am
post #19 of 31
I remembered someone saying that Noctua wants you to use the slower fan on the back of the NH-U14S if you upgrade it to push+pull fans. I just now tried looking up the cooler's manual and it actually mentions exactly what I remembered from that story.

See here, second page (middle column "Adding a second fan"): http://noctua.at/pdf/manuals/noctua_nh_u14s_manual_en.pdf

It really seems it's true that there's a mysterious 1500 RPM version of the fan that you can't buy. It can't just be typos everywhere. tongue.gif
post #20 of 31
It's a conspiracy! That's what it is! mad.gifbiggrin.gif
Thanks for that deepor! thumb.gif
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