CORSAIR SF850 vs JUSTOP Black 750W PSU

Price Comparison

The price difference between the CORSAIR SF850 and the JUSTOP Black 750W PSU is substantial. The CORSAIR SF850 is priced at £149.99, while the JUSTOP Black 750W PSU is significantly more affordable at £32.95. This represents a difference of £117.04, making the JUSTOP a budget-friendly option for those looking to save on their power supply purchase. However, it is essential to consider how this price disparity reflects on the features and performance of each unit, as the higher cost of the CORSAIR may offer additional value for certain users.

Power Output and Efficiency

In terms of power output, the CORSAIR SF850 stands out with a robust 850W capacity, tailored for high-performance systems. In contrast, the JUSTOP Black 750W PSU offers a lower maximum output of 750W. This 100W difference may not seem significant for casual users, but for gamers or professionals running demanding applications, the extra power from the CORSAIR could be crucial. Furthermore, the CORSAIR is 80 PLUS Platinum rated, indicating superior energy efficiency compared to the JUSTOP, which lacks a specified efficiency rating. Users seeking to optimise their energy consumption will find the CORSAIR a more appealing choice.

Form Factor and Compatibility

The CORSAIR SF850 features a compact SFX form factor, making it ideal for small-form-factor builds or situations where space is at a premium. This design allows it to fit into compact cases while still delivering powerful performance. On the other hand, the JUSTOP Black 750W PSU adheres to the standard ATX form factor, which is generally larger and may not fit in all small cases. Additionally, the CORSAIR's compliance with ATX 3.1 and PCIe 5.1 standards ensures it can support the latest hardware, providing future-proofing for advanced system builds. Users prioritising space and modern compatibility may lean towards the CORSAIR.

Cooling Solutions

Cooling solutions play a vital role in the performance and longevity of power supplies. The CORSAIR SF850 is equipped with a 92mm PWM cooling fan designed for low-noise operation, ensuring that it remains quiet while effectively dissipating heat. In contrast, the JUSTOP Black 750W PSU comes with a larger 120mm cooling fan, which might offer better airflow. However, the lack of specifics regarding noise levels could be a concern for users who value a silent operation. Overall, while both units have their cooling systems, the CORSAIR's fan is optimised for quieter performance, which may appeal to users building a silent rig.

Modular Design

The modular design of the CORSAIR SF850 allows for flexible cabling, which contributes to tidy cable management in any build. This feature is particularly beneficial in smaller cases where space is limited, as it reduces clutter and improves airflow within the case. In contrast, the JUSTOP Black 750W PSU does not highlight any modular features, suggesting that it may come with fixed cables. For users who appreciate a clean and organised build, the modularity of the CORSAIR is a significant advantage worth considering.

Protection Features

When it comes to safety and protection features, the JUSTOP Black 750W PSU boasts a range of protections including over voltage protection, over power protection, short circuit protection, and thermal overload cut-off protection. These features ensure that the unit operates safely under various conditions, providing peace of mind for users. While the CORSAIR SF850 does not explicitly list its protective features, its use of 105°C rated Japanese capacitors suggests a focus on reliability and quality. Users concerned about safety might appreciate the explicit protections of the JUSTOP, while those prioritising premium components may favour the CORSAIR.

Brand Reputation and Warranty

Brand reputation can significantly influence purchasing decisions, and Corsair is well-known for its high-quality components, particularly in the gaming and enthusiast communities. The CORSAIR SF850's premium build quality and performance are often highlighted in reviews. Conversely, JUSTOP is a less prominent brand, which may lead to uncertainty regarding the long-term reliability of their products. Furthermore, Corsair typically offers comprehensive warranties on their products, which may not be as extensive for lesser-known brands like JUSTOP. For users prioritising brand trust and support, the CORSAIR may be the more reassuring choice.

Which should you buy?

Choosing between the CORSAIR SF850 and the JUSTOP Black 750W PSU ultimately depends on your specific needs and budget. If you require a high-output, efficient, and compact power supply with advanced features, the CORSAIR SF850 is worth the investment at £149.99. However, if you're looking for a more affordable option for standard use, the JUSTOP Black 750W PSU at £32.95 offers essential features at a fraction of the price. Assessing your power requirements, system compatibility, and budget will guide you in making the right choice for your build.