SilverStone Nightjar NJ520 520W Fanless PSU Review

What is more quiet than a computer power supply with a fan? You guessed it, a PSU with no fan. This unit has small footprint builds in mind featuring excellent Platinum efficiency, flexible flat cables, and of course no sound profile to speak of. Does the 520 watt rated SilverStone Nightjar hold up when we put it in the incubator?


SilverStoneTek is a company best known for its high quality cases but its product lines extend into other components such as cooling, power, fans, storage, and so on. As a company, SilverStone has built up this impressive product repertoire in a very short time having been founded in 2003. Today, however we are interested in its power supplies which are comprised of the Strider, SFX, Nightjar, Gemini, and Zeus model lines that range from 300W to 1350W DC output. For this review, we are looking at the 520W model (SST-NJ520) in the Nightjar series. This power supply is produced in conjunction with Seasonic.

Seasonic is one of the older companies producing consumer power supplies having been founded in 1975 and entering the PC power supply production market in 1980. During that more than 30 years as a company Seasonic has cultivated lines of power supplies that are today some of the standard bearers for efficiency and quiet computing. This focus, and its reputation for quality, has lead to an explosion in production as Seasonic can be found providing OEM services on various model lines for Antec, XFX, Corsair, PC Power and Cooling, and of course under its own Seasonic brand.

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So Quiet Even the Koala Fell Asleep?

The SilverStone NJ520 is the 2nd fanless power supply we have seen from SilverStone and still one of the relative few fanless units we have seen over the years at all. What is interesting about that is, the fanless units we have seen have a better track record overall in our testing than fan-cooled brethren. There are many reasons why that could be the case, but for our purposes today it gives us great hope that we are again going to see a real quality unit. Given the test results of the previous Nightjar 500W, that seems even more promising as not only has the segment as a whole done well but so has SilverStone. Before moving on though, what does SilverStone have to say about this unit:

SilverStone’s Nightjar NJ520 is a fanless power supply that offers users a whole new experience of quietness and stability. Its premium components and engineering helped it to achieve 80 PLUS Platinum level of efficiency, reducing wasted heat and enable an open grille design that can operate reliably without fan attached. This noise-less performance can be maintained with stringent electrical characteristics even under 40آ°C operating environment.

As a versatile power supply, NJ520 has powerful +12V output of 43A for high-end system usage and its flexible, flat modular cables make assembly easy for improved case airflow. For professionals looking to build PCs or workstations for specialized settings such as recording studio or sound-optimized laboratories, the Nightjar series PSUs with their consistent emphasis on quality, stability, and reliability, are sure to satisfy.

With a positioning and marketing set very similar to what we saw with the previous Nightjar brought up to date for the last few years worth of changes, there are no real surprises here today as this unit really is aiming for just one niche which is readily apparent from its fanless design. Iif you guessed extreme overclocking you were incorrect. So, let's move on and see what we have to look forward to when we purchase the SilverStone NJ520 power supply in terms of documentation, accessories, cable count, rail layout, output characteristics, and general build quality this will become clear.