Conclusion

NZXT designed the C650 to land in the sweet spot of price and performance – offering excellent performance while remaining competitively priced – with an eye towards enticing enthusiasts who want to purchase an advanced PSU without breaking the bank. It's a great spot for buyers, but for manufacturers it can be a difficult one to compete in, especially with the prices of more advanced PSUs dropping with each passing day.

With its all-black chassis and cables, the NZXT C650 is an aesthetically neutral product, designed to subtly match the interior of any modern PC system. It features no lighting, which is a good thing for users that want to actually prevent the PSU from becoming the center of attention. Although NZXT is a company that enjoys making visually extravagant products, it seems that they preferred to keep the attitude - and cost - down on this one.

Quality is the strongest selling point of the NZXT C650. It is a unit based on a platform from Seasonic, arguably the most reputable PC PSU OEM, and it also happens to be a platform that was originally developed with long-term reliability in mind. The platform is designed so as to be efficient with the least possible stress on its parts, while the parts are all top quality products supplied by highly reputable manufacturers. It is no wonder why NZXT backs this unit up with a 10-year warranty – it is a product that, above all else, is designed to last.

The performance of the NZXT C650 is very good overall, with the designer clearly focusing on the power quality of the 12V line given the excellent figures we measured from the 12V rail. Readings from the 3.3V and 5V rails were not quite as good, though this isn't unique to NZXT, as most manufacturers tend to neglect the secondary voltage lines just a bit in favor of the major 12V line. The C650's thermal performance and acoustics were also well-balanced, creating a PSU that is quiet when expected and cool enough that it's not struggling to maintain that quiet nature.

As a result, the NZXT C650 is a great PSU overall, with NZXT making the right choice to focus on quality and longevity. The $110 price tag on the PSU is a little bold for an 80Plus Gold unit, and its current availability is rather limited – presumably due to COVID-released shipping backups – which is challenging the market potential of the product. Nonetheless, we feel that the very high quality and estimated longevity of the C650 will entice a significant portion of advanced users and enthusiasts, who enjoy purchasing products that will last them for many years to come.

 
Hot Test Results
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37 Comments

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  • eek2121 - Tuesday, August 11, 2020 - link

    I accidentally bought a Seasonic PSU thanks to Amazon’s infuriating inability to do a proper search. Still trying to decide whether to keep it or return it. Reply
  • evilspoons - Tuesday, August 11, 2020 - link

    Small nitpick on the "Main Output" table on the Hot Test Results page. At 20% you read 5.05 V, at 50% you read 5.01 V, and at 100% you read 4.97 V. All two decimals of precision. However, at 75% load it's just listed as "5 V". Shouldn't that be "5.00"? Reply
  • fred666 - Tuesday, August 11, 2020 - link

    What's the point of being 100% modular? Is someone really going to use this without the main ATX motherboard connection?
    It looks nice in the box, but I don't see any real-world advantage.
    Reply
  • eek2121 - Tuesday, August 11, 2020 - link

    The cables can easily be replaced. For example, cablemod allows you to purchase custom length cables. Also, what if a connector or cable breaks? Reply
  • Threska - Monday, August 31, 2020 - link

    I could see someone going with a shorter ATX power connector. Especially since in my case it really is a short distance and most cables are really long. Reply
  • plonk420 - Tuesday, August 11, 2020 - link

    less clutter in your case if you don't have very many components. my daily driver is a 2400G + m.2 ...and 3 SATA devices Reply
  • Lord of the Bored - Wednesday, August 12, 2020 - link

    That doesn't explain why you'd want to remove the main ATX power connector.
    I grant that there ARE some situations where you don't want the motherboard power connector, but they are very rare and the people that need them are used to "manually reconfiguring" the power supply already.
    Reply
  • GreenReaper - Wednesday, August 12, 2020 - link

    You may, however, wish to replace it if the cable has been frayed somehow, or a connector broke.

    Might not happen for most people, but you'll be (relatively) glad if it does for you.
    Reply
  • Arbie - Tuesday, August 11, 2020 - link

    Very important info missing from your cables chart is their lengths. At least, this becomes very important if one neglects to check it... Reply
  • Stele - Wednesday, August 12, 2020 - link

    "A trained eye will easily identify the OEM behind the NZXT C650 to be Seasonic" Ya know, it does expressly say right on the PSU label that Seasonic is the OEM... Reply

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