NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics Platinum - Fully Modular - PCIe 5.1 600W 12V-2x6 - Japanese Capacitors - Black

Very smooth and clean looking, got done building my pc and this chonky guy is perfect for the job

Gerardo · 2025-12-12 · via bestbuy

It's small and it works. I have no idea about it's power efficiency or anything like that. It came with cables.

miguel perez · 2026-04-06 · via amazon

I picked up the NZXT C850 SFX Gold for a small form factor build, and it’s been exactly what I was hoping for. Finding a power supply that can handle modern GPUs without compromising on size or stability isn’t easy, but this one checks the important boxes. The SFX footprint makes it much easier to work inside tighter cases, and the shorter cable runs help keep things manageable when space is limited. Performance-wise, it’s been solid. Voltage delivery has been stable under load, and I haven’t noticed any odd behavior during startup or heavy GPU usage. The inclusion of the 12V-2x6 connector is a big plus for newer cards, and it’s reassuring to have a unit that’s built around current standards rather than feeling like an afterthought adaptation. The zero RPM fan mode works well too. Under lighter workloads, the system stays quiet, and even when the fan does spin up, it’s not intrusive. Cable quality is better than average for this category. The fully modular setup helps a lot in small builds, and the included combs make routing cleaner than expected. That said, as others have pointed out, SFX builds are still inherently tight, so you’ll want to plan your cable routing ahead of time. It’s not difficult, just something to be aware of if you’re new to compact builds. At $199.99, it’s definitely not a budget option, but that’s pretty typical for high-quality SFX units with this level of output and efficiency. You’re paying for reliability, modern GPU support, and a compact design that doesn’t cut corners where it matters. For a high-performance SFF build, it feels like money well spent.

Frank H. · 2026-04-08 · via amazon

I really like the NZXT brand, and this power supply is no exception. The build quality is exactly what you'd expect from a premium unit. It has very clean voltage rails—the 12V, 5V, and 3.3V outputs are spot on with zero ripple issues noticed during testing. I know this configuration puts a massive power demand on the PSU. I am currently running an AMD Ryzen 9 9950X3D, a high-end graphics cards 5070, 256GB of RAM, and 8 NVMe drives in total. That is a lot of load, but I have been testing it under stress, and the unit is incredibly strong. It stays very stable even when everything is maxed out. Even under this heavy stress, the PSU stays cool. The heat sink and fan manage thermal dissipation well. If you are running in a small form factor case, the SFX form factor ensures excellent air circulation without needing bulky cooling solutions. This is an amazing piece of hardware for anyone looking to squeeze maximum performance out of a high-end system without worrying about stability or voltage fluctuations. Whether you are building a gaming beast or a heavy workstation, I highly recommend this PSU. It performs flawlessly and keeps the whole system running smoothly!

Ross · 2026-04-28 · via amazon

So while this is "GOLD" Rated, it has been reviewed and tested by Cybenetics as Platinum and I verified this on their site. A+ Noise levels appear to be true. Looks very nice, very clean build. This is an excellent little SFF PSU, 850w is quite enough for all but the highest end hardware. This has native support for 12v 2x6 and even includes two on the PSU! All cables have a debossed texture which helps a little with wire flexibility. They all feel very high quality. They include cable combs as well, which can be removed if you just want the space... sometimes its easier to organize cables when you can bunch them neatly. The only con so far is that the cables are maybe a little too long for some smaller ITX builds.. like anything 15L and under, they might be a little harder to handle. The Corsair SFF cables are much more suited for smaller builds like this. For point of reference I have this in my portable ITX build which is an Intel Core 225 and ASUS 5070 OC. This PSU runs this setup flawlessly! I have not heard or can hear the complaints with the noise levels... its been dead silent in my build. I currently have my ITX build in the NZXT H2 and its a perfect fit for this PSU (of course it would be!), it just has enough cable length for proper cable management and it just looks good as the finish of the PSU perfectly matches the case!

PCTA · 2026-04-08 · via amazon

Best Buy

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MSI

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Newegg

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Newegg (Open Box)

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