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Noiseblocker NB-eLoop 120mm Bionic Loop Propeller Fans - Page 5

post #41 of 159
Tell is how they are, when they arrive
post #42 of 159
Quote:
Originally Posted by lowfat View Post

Ordered 4 of the B12-P 120mm PWMs to replace my AP-15s. They look so damn sleek. Good to hear there are 180mm versions in the works.

 

Let me know about them, I've gone from AP-15 to Cougar 120mm PWM one and now I'm waiting for these.

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post #43 of 159
yea im really eager to see some reviews of these. im looking to get just 2 really nice fans one for rear exhaust and one for my CM 212 EVO to put on it as a pull
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post #44 of 159
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post #45 of 159
Quote:
Originally Posted by Conspiracy View Post

yea im really eager to see some reviews of these. im looking to get just 2 really nice fans one for rear exhaust and one for my CM 212 EVO to put on it as a pull

You might not want them as a pull fan. Some people report they make noise in pull configuration. Take that how you will.

There is a nice hardware.fr review here of 63 fans, including the B12-1 and B12-2. My français is a little rouillé, but here is my best translation of the B12-relevant sections:
Quote:
...Noiseblocker has taken some risks with the rotor [of the eLoops] by giving them only 6 blades, quite unusually as manufacturers generally prefer to use an odd number of blades to limit undesirable resonances. The blade surface is specially designed to repel dust, and the blades are connected at the tips to reduce turbulence. We will see if that is the case.

...[these fans] use the NB-NanoSLI bearing (in version 2, which includes 2 magnetic bearings, for the B12 models), for a long lifespan (...150,000 h for the B12-2, 160,000 h for the B12-1...). ...the B12 use a third type of frame, partway between [the PL and the MF series], which incorporates silicone anti-vibration corners.

...The B12-1 and B12-2 start at 5.0V and 3.6V, consuming 0.03A (the lowest value of the whole comparison) and and 0.09A, and are available for 17€ [ed. — $21.95 USD, although US domestic sources list them at $22.95]. For some unknown reason, we could not raise their rotational speed under 6.0V.

The performances of the Noiseblockers "could fit in a pocket handkerchief" [ed.—haha, meaning, they are very very close]. All offer a very satisfactory CFM-to-noise ratio, even if none (apart from the B12-1 at less than 650 RPM) approaches our reference fan.

In terms of acoustics... the M12-S2 is irreproachable, but the B12-1 and B12-2 emit disagreeable resonances at certain RPMs (might that only be the influence of the even-bladed rotor?), as shown by their uneven performance curves. Apart from these "critical" RPMs, the B12-1 is irreproachable, but the B12-2 acts a bit like the PL1 and PL2 ["less good" ( note the quotes), with a tiny metal crackling from their motor / bearing, audible at very close distances].

Now, how do the Noiseblockers fare when placed on a radiator? The B12-1 is, surprisingly, the most gifted in this exercise. This is relative, since the CFM it provides remains low, even if above 600 RPM the loss is a little less marked. It is followed closely by the M12-S2 and B12-2, which offer also a relatively low loss of CFM.

I strongly encourage everyone to check out their great tables and graphs on that page, as well as the summary graph (dynamic!) at this page.

Cheers,
-G
post #46 of 159
Quote:
Originally Posted by Gabedamien View Post

You might not want them as a pull fan. Some people report they make noise in pull configuration. Take that how you will.
There is a nice hardware.fr review here of 63 fans, including the B12-1 and B12-2. My français is a little rouillé, but here is my best translation of the B12-relevant sections:
I strongly encourage everyone to check out their great tables and graphs on that page, as well as the summary graph (dynamic!) at this page.
Cheers,
-G


-Noiseblocker themself confirmed this

-awesome review, thank you very much for posting this!!!
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post #47 of 159
thanks for the tip. ill consider using the noiseblock as rear exhaust and get a gentle typhoon maybe for my heatsink to use as a pull fan since my ram is soo tall i cant install a fan in push like normal
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post #48 of 159
Noiseblocker B12-PS: Gabe's Mini-Review
With minor M12-PS and M8-PS notes

Introduction & Configuration

I recently finished my first build ever, an mATX Hackintosh. My goals were fourfold: near native OS X, powerful, small, and quiet. Since I wouldn't have OS-level fan control, I was going to rely on BIOS-level fan control. My Maximus V Gene is supposed to be able to dial PWM fans down to any level duty cycle, whereas it cannot go below 60% on voltage control. Couple that with the horizontal fan mounts of my Silverstone FT03 and open-corner fan clips on my Venomous X Black, and the Noiseblocker B12-PS looked like a very good gamble.



I used three B12-PS, one M12-PS, and one M8-PS. The B12 fans went into my bottom intake, heatsink pull fan, and case exhaust. The M12-PS went in my center angled intake bracket, which is supposed to be a vibration culprit. The M8-PS was placed in the odd GPU exhaust bracket. I had to mount the B12 exhaust "outside" the case (on the FT03, this is no big deal because a grill goes over the top panel anyway) because otherwise it would interfere with the unusual mPCIe combo card on my motherboard. I've lined the back, front, and one side panel with acoustic foam, but I wasn't hyper-aggressive about noise blocking (this is a very "leaky" case).
>>>
Subjective Impressions and Notes (Click to show)
The frame is quite nice, it feels sturdy and looks good. The silicone corner inserts are much less fussy than the multiframes and their loose "faceplate ring;" they effectively cushion the frame against whatever you mount the fan on. The fan screws are in turn threaded through soft silicone inserts, so vibration is not transmitted very easily.

I greatly appreciated the modular cable design, as it meant I could easily choose the right cable length for each fan. For my M8-PS and M12-PS I had to loop excess cable, but for each B12 I was able to use a long or short length where appropriate. The cables are sleeved in black, and I also liked that the white/red cables (on the fan itself, before the modular connector) matched my system colors.

Unfortunately, my motherboard's manual LIES (this is confirmed on the ASUS forum), and PWM fans cannot be set lower than 60% duty cycle. For my B12-PS fans, this equates to ~800±50 RPM.

At that RPM, the B12-PS are certainly "quiet" in a subjective sense (this is in a very quiet room mind you), but they are definitely still audible. The noise characteristic is not bad. Sitting about 1 meter from the exhaust fan, I forget them most of the time. But I wish I could assess how they are at about 500 RPM. Maybe with my next BIOS revision...

Bringing myself much closer (less than half a meter), there is a subtle but audible motor tick noise. It sounds a little bit like a laptop hard drive seek noise, but quite soft. At one meter that noise is virtually inaudible. Again at close distance, if I turn my head 90° so my ear is facing the fan, there is a slight high-pitched overtone at all RPMs. Again, this is not audible at normal sitting distance.

When the fans rev up to ~1150+, the noise becomes a bit more tonal. It's still not bad, and in my computer they only get that high when stress testing with Prime95 or somesuch. Even during games at max settings at 1920x1200, my system doesn't get hot enough to make the fans call attention to themselves.

I wish I had some kind of hard data for you guys, or more valuable opinions (remember this is my first build!). I am aware that these fans have not set new reference levels in tests, and that they have issues in pull configuration. For what it is worth, my B12-PS in pull on the Venomous X doesn't seem to be obviously bad.

Summary

PROS:
  • Look great, unusual design is a conversation piece
  • Wide PWM range with low min RPM, HOWEVER I was not able to test below 750 RPM due to my mobo's BIOS limits
  • Easy and effective anti-vibration mounting design
  • Open corners work with most heatsink fan clips
  • New bearing is specifically rated to handle horizontal mounting
  • Modular cable design is a boon to small form factor builders
  • Pleasing enough tonal character at normal sitting distance
  • Decent noise-to-CFM
  • Some anti-dust properties, but I didn't have any practical way to test this

CONS:
  • COST! These are way too expensive in the USA, and even too expensive in Europe. NB's Multiframe series, which seem to perform better sonically, are already in this stratospheric price tier.
  • eLoop design seems irrelevant. Cool in theory, but the end result is much like any other premium fan. Other reviews allege that the even-bladed design results in resonance noises, too.
  • Alleged pull noise; I didn't specifically note this, but it's possible it's getting lost amidst the other fans or subdued by my soundproofing. Or I just am not experienced enough to ID it.
  • Mild tonal quality at higher RPMs. It's not annoying, but it does exist.
  • Slight motor tick noise at very close distances NOPE, my bad, this was just my PSU acting up and buzzing a bit (softly, and it was hard to isolate).

Conclusion

Ultimately I am satisfied with these fans, and I think they were an interesting experiment that works for my build, but I could not recommend them at their current price. At those levels, the Multiframes (or Gentle Typhoons, or other fans) might be a better bet. But if, like me, you are concerned with horizontal mounting, wide-range low-min-RPM PWM function, aesthetics, and case/clip constraints, the B12 series is certainly worth a look.
Edited by Gabedamien - 10/6/12 at 7:28pm
post #49 of 159
thanks a bunch. i am still waiting to see more reviews but im glad to see an honest one. i will consider the multiframe noiseblockers for the price if these new ones are not groundbreakingly that much better than what NB already has
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post #50 of 159
http://www.computerbase.de/artikel/gehaeuse-und-kuehlung/2012/test-noiseblocker-bionic-loop-luefter/5/

have a look at the video. it will give you a good impression, if you know the Noctua P12. Both are running at 1200rpm....
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