There’s no secret that the retail market for good 140mm fans is not as spoiled for choices as 120mm fans. Even Blacknoise themselves said they are working on 140mm versions of their popular NB-eLoop fans. But there are some good fans out there already and some potentially excellent fans coming out real soon too. Adding on to the review of the Swiftech Helix140 PWM, it made total sense to test out the 140mm fans I already have here. Blacknoise had sent 8 each of their PK-2 and PK-3 fans for all the radiator testing, and so here we are. The Blacksilent Pro series takes cues from the popular Blacksilent and Multiframe series, builds upon them in collaboration with the popular PC enthusiast community Hardwareluxx and aims to be a product of top quality with a clean design, backed by reliability and focus of performance-noise balance. Thanks again to Niels and Dirk from Blacknoise for the fan samples so we can see how close they get to all these claims.

Let’s begin by taking a look at the specs courtesy the product page:

As with the other fans from Blacknoise, the Blacksilent Pro fans share the same product page with a table listing out the nominal differences. The PK-3 is their high speed variant rated at 1700 RPM and is a 3 pin, voltage controlled fan. The data sheet on the same page gives more information about the fan including an operating voltage range of 3.5-13.8 V, a starting voltage of 4 V, a rated input power of 2.4 W (not to be confused with rated operating power) as well as an operating temperature range of -10-65 ºC. We also find out that the fan weight is 130g, uses their proprietary magnetic bearing (NanoSLI 2) with the impeller being made out of polycarbonate (Makrolon from Bayer) and the frame being made out of 20% fibreglass reinforced PBT (polybutylene terephthalate). The fan has a rated MTBF of 180,000 hours at 40 ºC (and presumably this number is the same, if not higher, at 25 ºC where most other manufacturers tend to report MTBF values at). To top off this impressive spec sheet, the fan carries a 6 year warranty as well. If we were to base a fan by the spec sheet alone, this would have won an award already. But let’s remind ourselves that it is easier to write things down than actually implement them, and head over to the next page with a level head to take a good look at the fan itself.

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