NZXT C850 Gold ATX 3.1 - Fully Modular Low-Noise PC Gaming Power Supply - 850 Wa vs JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan

Overview of the Products

The NZXT C850 Gold ATX 3.1 and the JUSTOP Black 700W Power Supply Unit are two distinct options catering to different segments within the power supply market. The NZXT C850 is priced at £84.90, while the JUSTOP unit is significantly cheaper at £29.95. This price difference hints at their target audiences and the features they offer.

The NZXT C850 is designed for high-performance gaming systems, boasting an ATX 3.1 compliance that ensures stability and efficiency. In contrast, the JUSTOP Black 700W aims for budget-conscious users seeking a reliable power supply for general desktop use. Understanding these distinctions is crucial for consumers looking to choose the best power supply for their needs.

Power Output and Efficiency

When it comes to power output, the NZXT C850 delivers a robust 850 watts, making it suitable for high-end components, particularly with its compatibility with the NVIDIA GeForce RTX 50 Series graphics cards. This high wattage is complemented by its gold certification, indicating greater efficiency and lower energy wastage.

On the other hand, the JUSTOP Black 700W provides a solid 700 watts of power. While this is adequate for most standard builds, it lacks the high-performance capabilities expected from a unit like the NZXT C850. Furthermore, the JUSTOP unit is rated at 70% efficiency, which is significantly lower than the efficiency typically associated with gold-rated power supplies, making the NZXT a more energy-efficient option.

Noise Levels and Cooling Solutions

The NZXT C850 prioritises a low-noise operation with its ultra-low noise 135mm fluid dynamic bearing fan. This fan operates silently under 50% load, ensuring a quieter gaming experience. This feature is particularly appealing to gamers and users who prioritise a silent operation in their builds.

Conversely, the JUSTOP Black 700W is equipped with a 120mm cooling fan designed to provide quieter airflow. However, it does not specify noise levels, leaving potential buyers uncertain about its quietness compared to the NZXT unit. For users sensitive to noise, the NZXT C850's clear specification of silent operation under certain loads may provide a significant advantage.

Build Quality and Component Durability

In terms of build quality, the NZXT C850 is constructed using 100% premium Japanese capacitors, which enhance hold-up time and reduce ripple noise. This high-quality construction provides reliable and stable power delivery, essential for high-performance systems.

The JUSTOP Black 700W, while providing decent stability, does not explicitly mention the quality of its components. It does include essential protection features such as over-voltage, over-power, and short circuit protection, which are crucial for safeguarding components. However, the lack of detail regarding component quality raises questions about its long-term durability compared to the NZXT C850.

Compatibility with Modern Systems

The NZXT C850 is compliant with the ATX 3.1 standard, which is essential for modern high-performance gaming systems. This compliance ensures compatibility with the latest components and technologies, making it a future-proof choice for enthusiasts looking to build or upgrade their systems.

In contrast, the JUSTOP Black 700W adheres to the earlier ATX 12V v.2.3 and EPS 12V v.2.92 standards, which may not fully support the latest hardware advancements. While it remains compatible with a broad range of systems, users wanting to build a cutting-edge gaming rig might find the NZXT C850's modern compliance more appealing.

Safety Features and Reliability

Safety features are critical in power supplies to protect both the unit and the components connected to it. The NZXT C850 includes power spike resistance, which is crucial for safeguarding sensitive components, particularly during demanding gaming sessions.

The JUSTOP Black 700W offers several protection mechanisms, including over-voltage, over-power, and thermal overload cut-off protection. However, it lacks the explicit mention of power spike resistance, which may concern users who are cautious about potential damage from power surges. The NZXT's additional focus on protection could translate into higher reliability for demanding applications.

Price Comparison and Value for Money

The NZXT C850 is priced at £84.90, reflecting its premium features and high-performance capabilities. This investment pays off for gamers and system builders who require a reliable and efficient power supply for demanding components.

In stark contrast, the JUSTOP Black 700W is available for £29.95, making it an attractive option for budget-conscious consumers. While it offers essential features suitable for general desktop use, the power output and efficiency are not on par with the NZXT C850. Therefore, while the JUSTOP provides great value for basic builds, it may not meet the needs of high-performance users.

Which should you buy?

Deciding between the NZXT C850 Gold ATX 3.1 and the JUSTOP Black 700W ultimately depends on your specific needs and budget. If you are a serious gamer or a system builder requiring high performance, efficiency, and durability, the NZXT C850 at £84.90 is the superior choice. Its advanced features, quiet operation, and robust build quality justify the higher price.

However, if you are looking for a budget-friendly power supply for a standard desktop setup, the JUSTOP Black 700W at £29.95 offers decent performance and essential safety features. It is a solid option for users who do not require the high wattage and advanced capabilities of the NZXT C850.