NZXT C850 Gold ATX 3.1 - Fully Modular Low-Noise PC Gaming Power Supply - 850 Watts - 80 Plus Gold - 12V-2x6 Connector - Zero Fan Mode - 100% Japanese Capacitors - Black
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AI Verdict
An 850-watt, fully modular ATX 3.1 power supply with a 12V-2x6 connector, built for gaming PCs running NVIDIA RTX 40 Series GPUs.
This 850-watt ATX 3.1 power supply is a strong fit for modern gaming systems, particularly those with NVIDIA RTX 40 Series GPUs, due to its dedicated 12V-2x6 connector and high efficiency ratings. Its fully modular design aids in cleaner builds.
If you're pushing extreme overclocks or running multiple high-end GPUs, consider a higher wattage PSU (1000W+) with a Platinum efficiency rating for maximum headroom and energy savings.
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Pros
- Compliant with ATX 3.1 standard for stability and power spike resistance.
- Includes a 12V-2x6 connector capable of supplying up to 600 watts to NVIDIA RTX 40 Series graphics cards.
- Achieves 80 PLUS Gold and Cybenetics Gold efficiency certifications.
- Features a 135mm fluid dynamic bearing fan with Zero Fan Mode, operating silently under 50% load.
- Constructed with 100% premium Japanese capacitors for stable power delivery and minimal ripple noise.
- Fully modular design allows for connecting only necessary cables, reducing clutter.
Cons
- Cables can be stiff, potentially making routing difficult in some builds.
- Some users report noticeable fan noise when the unit is under heavy load, despite its A- noise rating.
- The packaging is described as basic, lacking a premium unboxing experience.
- Does not include RGB lighting, which might disappoint users seeking aesthetic customization.
Dimension Scores
It boasts 80 PLUS Gold and Cybenetics Gold efficiency, 850 watts, and ATX 3.1 with a 600W 12V-2x6 connector for modern GPUs.
The 135mm FDB fan with Zero Fan Mode ensures silent operation under 50% load and carries a Cybenetics A- Noise Level certification, though some report noise under heavy load.
It uses 100% premium Japanese capacitors for stable power delivery and comes with a 7-year warranty.
The fully modular design is beneficial for reducing clutter, but user feedback indicates the cables are stiff, which can hinder routing.
Best For
- Gaming PCs utilizing NVIDIA RTX 40 Series GPUs requiring a 12V-2x6 connector.
- New PC builds or upgrades needing ATX 3.1 compliance for future-proofing.
- Users prioritizing quiet operation during light computing tasks due to Zero Fan Mode.
- Systems where efficient power delivery and component stability are critical.
Not Recommended For
- Builders who require highly flexible cables for intricate routing in compact cases.
- Users expecting an RGB-lit power supply for aesthetic coordination.
- Budget-focused builds where similar wattage and efficiency might be found at a lower price point.
Watch Out For
- The included cables are reported to be stiff, which can complicate cable management and routing, especially in smaller cases.
- While generally quiet, some users have experienced the fan becoming audible under sustained heavy loads, contrary to expectations for a low-noise unit.
- The product's packaging is considered basic by some, which might detract from the initial unboxing experience for a component in this price band.
- Despite its ATX 3.1 compliance, one user on Reddit reported an 'explodes after only 3 days' incident, though this appears to be an isolated and extreme case.
Full Specifications
| ASIN | B0D1VDTX8B |
| Brand | NZXT |
| Color | Black |
| Series | NZXT C850 Gold ATX 3.1 |
| Wattage | 850 watts |
| Model Name | NZXT C850 Gold ATX 3.1 |
| Form Factor | ATX |
| Item Weight | 7.78 pounds |
| Manufacturer | NZXT |
| Connector Type | ATX |
| Cooling Method | Air |
| Output Wattage | 850 |
| Item model number | PA-8G2BB-US |
| Compatible Devices | Desktop PC |
| Product Dimensions | 6.3 x 5.91 x 3.39 inches |
| Item Dimensions LxWxH | 6.3 x 5.91 x 3.39 inches |
| Item dimensions L x W x H | 6.3 x 5.91 x 3.39 inches |
What Buyers Say
Users frequently highlight the NZXT C850 Gold ATX 3.1's quiet operation under light loads, often attributing it to the Zero Fan Mode. Many appreciate its readiness for NVIDIA RTX 40 Series GPUs, specifically mentioning the included 12V-2x6 connector as a key selling point for modern builds. The fully modular design is consistently praised for simplifying installation and improving case aesthetics. However, some buyers have found the cables to be stiff, making them less pliable for routing, and a few noted the fan can become audible under high stress.
“Needed a new PSU for my 4080, and this thing just works, no fuss, no weird noises, and the 12V-2x6 cable was a lifesaver, even if the other cables were a bit of a wrestle to bend.”
Common Praise
- Operates very quietly, especially with the Zero Fan Mode active under light loads.
- Provides the necessary 12V-2x6 connector for NVIDIA RTX 40 Series graphics cards without adapters.
- Fully modular design makes installation and cable routing straightforward for a cleaner build.
- Delivers stable voltage and consistent power, even under demanding conditions.
- Easy to install and set up in a new or existing PC build.
Common Complaints
- The included power cables are stiff, which can make bending and routing them difficult in tight spaces.
- Fan noise can become noticeable when the power supply is under significant, sustained load.
- The product's packaging is perceived as basic and not commensurate with a premium component.
- Some users feel it is overpriced compared to other power supplies offering similar specifications.
Ownership Tips
- The Zero Fan Mode genuinely keeps the system silent during web browsing or light gaming, with the fan only spinning up during intense sessions.
- The 12V-2x6 cable is a direct fit for 40 series GPUs, eliminating the need for bulky adapter cables.
- Despite the stiffness, the fully modular nature still makes for a cleaner build than non-modular options.
- Power delivery remains stable even when pushing high-end components, preventing unexpected shutdowns or performance dips.
- The black finish blends seamlessly into most PC cases without drawing unnecessary attention.
Frequently Asked Questions
What does ATX 3.1 compliance mean for my PC?
ATX 3.1 compliance ensures the power supply can handle transient power spikes from modern high-performance components, especially GPUs, providing more stable and reliable power delivery. It's built to prevent system crashes during sudden power draw increases.
Is this power supply truly quiet?
Yes, it features a 135mm fluid dynamic bearing fan with Zero Fan Mode, meaning the fan is completely off and silent when the power supply is under 50% load. It also holds a Cybenetics A- Noise Level certification.
What graphics cards are compatible with the 12V-2x6 connector?
The 12V-2x6 connector is specifically designed to power NVIDIA GeForce RTX 40 Series graphics cards, delivering up to 600 watts directly to the GPU without needing adapters.
What is the warranty period for this power supply?
The NZXT C850 Gold ATX 3.1 power supply is backed by a 7-year warranty, providing long-term assurance for its performance and reliability.
Are the cables easy to manage?
The power supply is fully modular, which simplifies cable management by allowing you to connect only the cables you need. However, some users have noted that the cables themselves can be stiff, potentially making routing more challenging than with more flexible options.
Buying Guide
When you're picking a power supply, you're not just buying a box that makes your PC turn on. You're investing in the stability and longevity of all your expensive components. A good power supply delivers consistent, clean power, which prevents crashes and protects your CPU and GPU from damage. Don't cheap out here; it's the foundation of your entire system.
Wattage (850 watts)
This is how much power the unit can supply. Think of it like the engine size in a car; more watts mean it can handle more demanding components, especially powerful graphics cards and CPUs, without being strained. For a gaming PC, 850 watts is a sweet spot for many high-end single-GPU setups.
80 PLUS Gold
This certification indicates how efficiently the power supply converts wall power into usable PC power. Gold means it's at least 87% efficient at 100% load, and up to 90% at 50% load, which translates to less wasted energy as heat and lower electricity bills. It's like getting better gas mileage for your computer.
ATX 3.1 & 12V-2x6 Connector
This is the latest standard for power supplies, specifically designed for modern, power-hungry graphics cards. The 12V-2x6 connector is a direct, single cable solution for NVIDIA's RTX 40 Series GPUs, ensuring stable power delivery and preventing the need for multiple adapter cables that can be messy and unreliable.
Fully Modular
This means you only plug in the cables you actually need for your components. It's like having custom-fit cables for your car's engine bay. This reduces clutter inside your PC case, which improves airflow and makes building or upgrading much easier and cleaner.
Alternatives
If you need more power for extreme multi-GPU setups or future-proof beyond 850 watts, look for power supplies with 1000W or higher wattage. For maximum energy efficiency, consider units with an 80 PLUS Platinum or Titanium rating.
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