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NZXT C850 Gold ATX 3.1 - Fully Modular Low-Noise PC Gaming Power Supply - 850 Wa vs Corsair HX1000i Fully Modular Ultra-Low Noise ATX Power Supply - ATX 3.1 & PCIe

Updated August 2026The NZXT C850 Gold offers excellent value for budget-conscious gamers, while the Corsair HX1000i provides advanced features for those seeking high performance.

The NZXT C850 Gold offers excellent value for budget-conscious gamers, while the Corsair HX1000i provides advanced features for those seeking high performance.

Why NZXT C850 Gold ATX 3.1 - Fully Modular Low-Noise PC Gaming Power Supply - 850 Wa is better

affordable price

NZXT C850 Gold is significantly cheaper at £84.90

quiet operation

NZXT C850 Gold operates silently under 50% load

modular design

Both are fully modular, but NZXT is simpler for basic builds

Why Corsair HX1000i Fully Modular Ultra-Low Noise ATX Power Supply - ATX 3.1 & PCIe is better

advanced features

Corsair HX1000i includes iCUE software for customization

higher wattage

Corsair HX1000i supports higher power demands with 1000W

better compatibility

Corsair HX1000i supports PCIe Gen 5.1 for future-proofing

Overall score

NZXT C850 Gold ATX 3.1 - Fully Modular Low-Noise PC Gaming Power Supply - 850 Wa
75
Corsair HX1000i Fully Modular Ultra-Low Noise ATX Power Supply - ATX 3.1 & PCIe
85

Specifications

SpecNZXT C850 Gold ATX 3.1 - Fully Modular Low-Noise PC Gaming Power Supply - 850 WaCorsair HX1000i Fully Modular Ultra-Low Noise ATX Power Supply - ATX 3.1 & PCIe
BrandNZXTCorsair
ATX Standard3.13.1
Fan TypeFluid DynamicFluid Dynamic
Zero Fan ModeYesYes
CapacitorsJapaneseUnknown

Dimension comparison

NZXT C850 Gold ATX 3.1 - Fully Modular Low-Noise PC Gaming Power Supply - 850 WaCorsair HX1000i Fully Modular Ultra-Low Noise ATX Power Supply - ATX 3.1 & PCIe

Overview of NZXT C850 Gold and Corsair HX1000i

The NZXT C850 Gold and Corsair HX1000i are both premium power supplies that cater to high-performance gaming systems. The NZXT C850 Gold is priced at £84.90, while the Corsair HX1000i comes in at a significantly higher price of £169.99. This price difference may reflect the features and capabilities that each product offers, making it crucial for potential buyers to assess which unit aligns with their needs.

The NZXT C850 Gold is designed with the ATX 3.1 standard, ensuring stability and efficiency for modern gaming components. In contrast, the Corsair HX1000i also adheres to the ATX 3.1 standard but adds advanced features such as customisable fan curves through its iCUE software. This comparison highlights that while both power supplies deliver reliable performance, they cater to slightly different user preferences.

Performance and Efficiency

In terms of performance, both power supplies excel in delivering stable power to high-demand components. The NZXT C850 Gold features a robust construction with 100% premium Japanese capacitors, which significantly improves hold-up time and minimizes ripple noise. This ensures that even under heavy loads, the power supply maintains stability.

On the other hand, the Corsair HX1000i supports the PCIe Gen 5.1 platform and is engineered to resist transient power spikes. This capability may be particularly beneficial for users who require maximum stability during intense gaming sessions. While both units offer high efficiency, the Corsair's added features for power management might appeal to those looking for enhanced control over their system’s power delivery.

Noise Levels

When it comes to noise levels, both power supplies feature advanced cooling solutions to ensure quiet operation. The NZXT C850 Gold is equipped with a 135mm fluid dynamic bearing fan that operates in a Zero Fan Mode, remaining completely silent when under 50% load. This makes it an excellent choice for users who prioritise a quiet gaming environment.

Conversely, the Corsair HX1000i includes a 140mm Fluid Dynamic Bearing fan that also supports a Zero RPM Fan Mode. This means that at low and medium loads, the fan can switch off entirely, promoting near-silent operation. Both models excel in this aspect, but the choice may ultimately come down to user preference regarding fan size and design.

Modular Cabling

The modularity of a power supply is a key factor for many builders. The NZXT C850 Gold is fully modular, allowing users to connect only the cables they need, which helps maintain a clean and tidy build. This feature is critical for users who desire an uncluttered aesthetic and efficient airflow within their PC case.

The Corsair HX1000i also boasts fully modular cabling, which similarly facilitates neat cable management. This shared feature means that both power supplies cater well to users who value a tidy setup. However, the Corsair's advanced software capabilities may offer additional appeal for those who enjoy customising their system's performance further.

Compatibility with New Technologies

Both power supplies are compliant with the ATX 3.1 standard, which is crucial for supporting the latest PC components. The NZXT C850 Gold is specifically designed to support high-performance NVIDIA GeForce RTX 50 Series graphics cards with its durable, heat-resistant 12V-2x6 connector that can deliver up to 600 watts. This makes it a suitable choice for users planning to utilise cutting-edge graphics technology.

In comparison, the Corsair HX1000i’s Intel ATX 3.1 certification supports the latest PCIe Gen 5.1 platform, ensuring compatibility with the newest hardware standards. This could be particularly relevant for gamers and professionals who frequently upgrade their systems. Both products showcase a commitment to future-proofing, but the HX1000i's support for the newest PCIe standard may provide a slight edge for tech enthusiasts.

Software Integration

Software capabilities can enhance the user experience, and this is where the Corsair HX1000i stands out. It features powerful CORSAIR iCUE software that allows users to create custom fan curves, monitor power settings, and toggle between single to multi-rail overcurrent protection on the fly. This level of customisation can be pivotal for users who want heightened control over their system’s performance.

In contrast, the NZXT C850 Gold does not mention any software integration, which means users miss out on the potential for real-time monitoring and adjustments. For tech-savvy users, the Corsair’s software capabilities may greatly influence their purchasing decision, as it offers a more tailored approach to power management.

Price Point

The NZXT C850 Gold is significantly more affordable at £84.90, making it an attractive option for budget-conscious gamers or those looking to build a high-performance PC without breaking the bank. Its features are robust enough to support most gaming systems, especially for users not pushing the latest tech limits.

The Corsair HX1000i, priced at £169.99, represents a premium investment. While it offers additional features such as software integration and higher wattage capacity, the price difference is substantial. This might deter casual gamers or those on a tighter budget, but for users who require the utmost reliability and advanced features, the investment could be justified.

Which should you buy?

Ultimately, the decision between the NZXT C850 Gold and the Corsair HX1000i hinges on individual needs and preferences. If you are looking for an efficient, quiet, and budget-friendly power supply, the NZXT C850 Gold is an excellent choice. However, if you value advanced features, software integration, and are willing to invest more for enhanced performance and compatibility with the latest technologies, the Corsair HX1000i may be the better option. Each power supply has its strengths, catering to different segments of the gaming community.

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NZXT C850 Gold ATX 3.1 - Fully Modular Low-Noise PC Gaming Power Supply - 850 Wa vs Corsair HX1000i Fully Modular Ultra-Low Noise ATX Power Supply - ATX 3.1 & PCIe | versusfinder