Finding the differences in a series of power supplies

Turns out those “different” power boxes are mostly twins — and commenters want the real tea

TLDR: Testing found NZXT’s 750W, 850W, and 1000W power supplies are mostly the same design with a few upgraded parts, and they perform very similarly. Commenters weren’t satisfied with “mostly”: they want to know if pricier models are actually better quality, while others are already demanding smaller next-gen designs.

The big reveal from LTT Labs is almost hilariously simple: many power supplies sold as a family of 750W, 850W, and 1000W models are basically the same box wearing slightly different shoes. In NZXT’s new C Gold Core lineup, the outside branding changes and the power number climbs, but inside it’s mostly the same layout, same design, and same overall behavior, with a few upgraded parts added where needed. Translation for normal humans: the stronger versions usually aren’t a totally different machine, just a tuned-up version of the same one.

And honestly? The comments immediately turned into a detective drama. One camp wanted the real juicy stuff: not just “these are similar,” but exactly which parts get better and whether higher-priced models are using merely stronger pieces or genuinely nicer ones. That vibe came through hard in alexjurkiewicz’s reaction, which basically reads like, “Okay, but show us the receipts.” The other comment thread took a sharp left into futuristic wish-list territory, with people asking why desktop power supplies haven’t had their own tiny-tech glow-up the way phone and laptop chargers did. Suddenly the star of the conversation wasn’t even NZXT — it was “where’s the GaN version?”

The funniest part is that the test results were almost boringly calm: all three models behaved very similarly, and some even landed above the efficiency level advertised. But in true internet fashion, a quiet engineering story became a spicy comment-section debate about hidden quality tiers, premium pricing, and whether PC power bricks are overdue for their main-character makeover.

Key Points

  • The article examines how power supplies within the same product series compare, using NZXT’s C Gold Core 750 W, 850 W, and 1000 W models as a case study.
  • It states that models in a series usually share the same chassis, PCB, electrical topology, heat management, and feature set, with only selected component and cable differences.
  • For the NZXT C Gold Core lineup, major differences include cable count, 12V-2x6 connector capability, switching components, capacitors, and the transformer used in the 1000 W model.
  • Cybenetics reports are cited as a useful source for identifying component-level changes between certified power supply models.
  • The three tested units performed very similarly, and the article says all were actually rated 80 PLUS Platinum and Cybenetics ETA Platinum despite being marketed as Gold-tier units.

Hottest takes

"dive into the exact differences in components" — alexjurkiewicz
"does the quality go up too?" — alexjurkiewicz
"Is anybody doing GaN power supplies for desktops?" — powerhfk
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