CORSAIR RM850e vs JUSTOP Black 650W PSU

Price Comparison

The CORSAIR RM850e is significantly more expensive than the JUSTOP Black 650W PSU, with a price difference of £56.00. The RM850e retails for £85.99, while the JUSTOP Black is priced at just £29.99. This price disparity suggests that the CORSAIR model may offer additional features or superior performance to justify its higher cost. However, for budget-conscious consumers or those with less demanding power requirements, the JUSTOP PSU presents a much more affordable option.

Power Output

In terms of power output, the CORSAIR RM850e offers a robust 850W, compared to the 650W provided by the JUSTOP Black. This 200W difference can be crucial for users with high-performance systems that require more power for components such as graphics cards and processors. The higher wattage of the RM850e ensures it can handle more demanding setups, particularly those that may experience power spikes. For users with basic systems, the 650W from JUSTOP may suffice, but it limits future upgrades.

Build Quality and Certifications

The CORSAIR RM850e boasts Intel ATX 3.1 certification, ensuring it meets modern power standards, which is not explicitly mentioned for the JUSTOP Black. Additionally, the RM850e features 105°C-rated capacitors that promise reliable performance and longevity. On the other hand, the JUSTOP Black does provide safety certifications, including UKCA, CE, FCC, UL, and TUV, which reflects its adherence to safety standards. While both units have their strengths, the RM850e’s advanced certification and component quality could result in better reliability over time.

Cooling and Noise Levels

The cooling systems of these two PSUs differ significantly. The CORSAIR RM850e includes a 120mm rifle bearing fan designed for low noise, even under full load. This feature is particularly important for users who prioritise a quiet computing environment. In contrast, the JUSTOP Black PSU also features a 120mm cooling fan but lacks specific details about its noise levels or cooling efficiency. Therefore, the RM850e may be the better choice for users sensitive to noise or those who operate in quiet settings.

Modular Design

Another key distinction lies in the design of the power supplies. The CORSAIR RM850e is a fully modular PSU, allowing users to connect only the cables necessary for their specific build. This not only simplifies installation but also improves cable management within the case. Conversely, the JUSTOP Black does not mention a modular design, which could lead to excess cables cluttering the interior of a PC case. Users seeking a clean and organised build will likely prefer the flexibility offered by the RM850e.

Protection Features

Both models incorporate various protection features, but the depth of protection varies. The JUSTOP Black includes over voltage protection, over power protection, short circuit protection, and thermal overload cut-off protection, ensuring safe operation. While the CORSAIR RM850e’s features are not detailed in the same way, its advanced build quality and certifications imply a high level of reliability. Users prioritising safety and protection features might find the JUSTOP Black appealing due to its clearly defined safety measures.

Compatibility and Future-Proofing

The CORSAIR RM850e's support for the latest Intel ATX 3.1 standard and compatibility with PCIe 5.1 signifies its capability to handle next-generation components, making it a more future-proof option for enthusiasts looking to upgrade. In contrast, the JUSTOP Black does not specify compatibility with newer standards, which may limit its appeal for users planning to invest in high-performance hardware in the future. This aspect could be critical for users who want a power supply that will last through multiple upgrades.

Which should you buy?

The decision between the CORSAIR RM850e and the JUSTOP Black 650W PSU largely depends on your specific needs and budget. If you require a high-performance power supply capable of supporting demanding components with advanced features, the RM850e is undoubtedly the superior choice at £85.99. However, if you are looking for a budget-friendly option for a standard system and prioritise cost, the JUSTOP Black at £29.99 offers a solid value. Ultimately, your selection should align with your power requirements, future upgrade plans, and budget constraints.