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JUSTOP Black 750W PSU vs NZXT C850 Gold Core - 850W ATX 3.1 Power Supply - 80 PLUS Gold - Cybenetics Plat

Updated August 2026The NZXT C850 Gold Core is the superior choice for high-performance systems, while the JUSTOP Black 750W PSU is a budget-friendly option for standard setups.

The NZXT C850 Gold Core is the superior choice for high-performance systems, while the JUSTOP Black 750W PSU is a budget-friendly option for standard setups.

Why JUSTOP Black 750W PSU is better

affordable price

JUSTOP is significantly cheaper at £32.95

adequate power

750W is sufficient for most mid-range setups

basic features

Offers essential safety protections

Why NZXT C850 Gold Core - 850W ATX 3.1 Power Supply - 80 PLUS Gold - Cybenetics Plat is better

higher power

850W supports high-performance systems

efficiency rating

80 PLUS Gold certification ensures better energy efficiency

advanced cooling

Larger fan with Zero RPM mode for quieter operation

Overall score

JUSTOP Black 750W PSU
65
NZXT C850 Gold Core - 850W ATX 3.1 Power Supply - 80 PLUS Gold - Cybenetics Plat
85

Specifications

SpecJUSTOP Black 750W PSUNZXT C850 Gold Core - 850W ATX 3.1 Power Supply - 80 PLUS Gold - Cybenetics Plat
BrandJUSTOPNZXT
Wattage750W850W
Efficiency RatingN/A80 PLUS Gold
Cooling Fan120mm135mm
Safety FeaturesYesYes

Dimension comparison

JUSTOP Black 750W PSUNZXT C850 Gold Core - 850W ATX 3.1 Power Supply - 80 PLUS Gold - Cybenetics Plat

Introduction

When it comes to selecting a power supply for your desktop PC, two options stand out: the JUSTOP Black 750W PSU and the NZXT C850 Gold Core 850W ATX 3.1 Power Supply. Both power supplies offer distinct advantages that cater to different user needs, and this comparison will delve into their features, performance, and overall value.

Power Output

The most immediate distinction between the JUSTOP Black 750W PSU and the NZXT C850 Gold Core is their power output. The JUSTOP provides 750W, which is ample for most mid-range gaming setups and office PCs. In contrast, the NZXT delivers a higher output of 850W, making it more suitable for high-performance systems requiring additional power, particularly those equipped with next-gen GPUs. If you are planning to run multiple graphics cards or a power-hungry CPU, the NZXT might be the more prudent choice.

Efficiency Ratings

Efficiency is a critical factor in power supplies, impacting both performance and electricity consumption. The NZXT C850 Gold Core boasts an 80 PLUS Gold certification, indicating its high efficiency and lower energy usage compared to standard units. While the JUSTOP does not specify an efficiency rating, the absence of such a certification could mean a less efficient power delivery, potentially resulting in higher electricity bills over time. For users concerned about their energy footprint, the NZXT is the clear winner in this category.

Cooling Mechanisms

Both power supplies incorporate cooling mechanisms, but they differ significantly in design and performance. The JUSTOP Black 750W PSU features a 120mm cooling fan, providing adequate airflow for cooling. However, the NZXT C850 Gold Core employs a larger 135mm fluid dynamic bearing fan, designed for whisper-quiet operation with a noise level below 15 dBA during normal use. Additionally, it includes a Zero RPM mode that allows the fan to remain off during light workloads, ensuring silent performance. For users prioritising noise reduction, the NZXT's advanced cooling technology is a major advantage.

Safety Features

Safety is paramount when it comes to power supplies, and both units offer robust protection features. The JUSTOP Black 750W PSU includes over voltage protection, over power protection, short circuit protection, and thermal overload cut-off protection, all of which are vital for safeguarding your components. Meanwhile, the NZXT C850 Gold Core also features similar protections but is further enhanced by its 80 PLUS Gold efficiency, which inherently contributes to safer operation under load. Users can feel secure knowing that both power supplies have been designed with safety in mind.

Compatibility

Compatibility with modern hardware is crucial for any power supply. The NZXT C850 Gold Core is ATX 3.1 certified and PCIE 5.1 ready, making it an ideal choice for the latest NVIDIA graphics cards and other high-performance components. It supports a dual-colour 12V-2x6 connector, ensuring safe and stable power delivery. Conversely, the JUSTOP Black 750W PSU provides standard connectors, including a single 8-pin (4+4) 12V rail and numerous SATA connectors, which may limit future upgrade options. For those planning to use the latest technology, the NZXT offers greater versatility.

Price Point

Price can often be a deciding factor for consumers. The JUSTOP Black 750W PSU is priced at £32.95, making it an affordable option for those on a budget. In comparison, the NZXT C850 Gold Core is significantly more expensive at £89.99. While the higher price might deter some buyers, it reflects the advanced technology and features packed into the NZXT unit. For users seeking long-term value and performance, the investment in the NZXT may prove worthwhile, especially for high-demand setups.

Brand Reputation

Brand reputation can influence purchasing decisions, and both JUSTOP and NZXT have established themselves in the power supply market. NZXT, known for its premium quality and innovative designs, has a strong following among gamers and PC builders. JUSTOP, while offering solid products, may not have the same level of recognition. This difference in brand perception can affect user confidence in the reliability and performance of each power supply. For those who value brand trust, the NZXT C850 Gold Core may be the more appealing option.

Which should you buy?

Deciding between the JUSTOP Black 750W PSU and the NZXT C850 Gold Core ultimately depends on your specific needs. If you are looking for an economical choice that provides adequate power for standard setups, the JUSTOP could suffice. However, for users aiming for high efficiency, advanced cooling, and compatibility with next-generation hardware, the NZXT C850 Gold Core is the superior option despite its higher price. Ultimately, consider your current and future needs, as well as your budget, to make the most informed choice.

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JUSTOP Black 750W PSU vs NZXT C850 Gold Core - 850W ATX 3.1 Power Supply - 80 PLUS Gold - Cybenetics Plat | versusfinder