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Pros Quiet and efficient, comes with metal and rubber screws
Summary Function over form is clearly Noctua's game and it shows. Brown on beige is ugly in pretty much any case. I was going for a cohesive design inside and out, but I wanted the best quiet fans so that threw things off. Other than that I have no gripes because...
These fans are the best. Quality costs money and you can hear where your money went with these.
Efficient airflow, but most importantly, QUIET. I have my desktop for audio production so quiet is a priority. These are literally the quietest case fans money can buy. If that's what you're after, don't even bother with anything else. Seriously, they're that good.
Pros In 2 pack bundle price is more decent Great product Silent
Cons Not a real Cons but not a "big" air performer, see summary
Summary This fan are nice pieces or ART They are very good if you don't need lot of air and no noise. Low wattage pc is perfect. In my principal one, I use 2 of them in my pc and 1 Noctua 14mm in a Lian LI and it is near limit in full cpu gpu load but works perfectly (i3 3100 3.1 wt Corsair A70 and Gigabyte 6770 all both passive)
I also use it in Small pc like Sonata III with dual core low consumption. I put passive heatsink on cpu and let the airflow doing the job by the Noctua (back fan on the case).
Noctua is very nice product. Never had a single problem with their fan over the last 4-5 years.
Summary Bought these for use as case fans, and needed them to be Quiet! they are definatly very Quiet. You can't go wrong with Noctua fans. They just pull enough are out of my case to keep the air flowing. They are rather expensive but well worth the money spent!
Pros Very quiet on low mode Good performance on high if needed
Cons Ugly color scheme
Summary I got one of these for an older case that had 1 for exhaust. I built a WHS box so didn't need a lot of airflow due to lower temps. I did require the fans to be very quiet since the server box is on all the time and in an area that is exposed. On the low voltage mode it is virtually silent, just a very very faint noise is audible. I highly recommend them for a silent build such as the one I did.
Summary This fan is slightly under power in terms of air pressure or air velocity, but enough to feed fresh cool air for most PC setups. This fan is superb in build quality and ultra quiet. This is without any doubt the quietest component among those moving ones inside my case. When it comes to fans, I always go with Noctua.
Succeeding the vastly successful NF-S12, the NF-S12B is a next generation quiet fan featuring Noctua's advanced SCD2 technology as well as a highly optimised blade geometry with Bevelled Blade Tips that improves its award-winning predecessor's airflow efficiency by up to 10%. Topped off with Noctua's time-tested SSO-Bearing, 6 years warranty and super-slow 700/500 rpm speed settings, the NF-S12B ULN is a premium quality fan for ultra-low-noise applications where maximum quietness has top priority.
Highly optimised impeller with Bevelled Blade Tips Thanks to its further refined blade geometry with extended leading edges and Bevelled Blade Tips, the NF-S12B achieves up to 10% more airflow and static pressure than its much acclaimed predecessor at the same noise level.
2 speed settings for maximum quietness Providing 700 and 500 rpm speed settings via the supplied adapter, the ULN (Ultra-Low-Noise) version is tailor made for serious silent enthusiasts who demand super-slow running speeds and utmost quietness of operation.
Smooth Commutation Drive 2 The latest version of Noctua’s advanced SCD drive system ensures superb running smoothness by eliminating torque variations and switching noises.
SSO-Bearing Noctua’s time-tested SSO-Bearing technology has become synonymous with supremely quiet operation and exceptional long-term stability.
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