CORSAIR RM650e vs JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan

Price Comparison

When it comes to pricing, the CORSAIR RM650e is significantly more expensive than the JUSTOP Black 700W Power Supply Unit. The RM650e is priced at £71.57, while the JUSTOP is available for just £29.95. This difference of £41.62 makes the JUSTOP a more attractive option for budget-conscious consumers. However, a lower price often comes with trade-offs in terms of features and performance, which we'll explore in greater detail.

Power Output

The JUSTOP Black 700W offers a higher power output at 700W compared to the 650W provided by the CORSAIR RM650e. This 50W advantage can be crucial for users with high-performance systems that require more power, especially those running multiple graphics cards or demanding CPUs. The increased wattage also allows for more headroom in power delivery, which can be beneficial during peak usage scenarios.

Efficiency and Certification

In terms of efficiency, the CORSAIR RM650e is designed to meet the Intel ATX 3.1 certification, ensuring it can handle the latest power requirements with improved efficiency. On the other hand, the JUSTOP Black 700W has an efficiency rating of 70%, which is lower but still meets standard operational requirements. While the CORSAIR may offer better performance in terms of energy usage, the JUSTOP provides a solid option for users who need a reliable power supply without the premium price tag.

Cooling Solutions

Cooling is a vital aspect of any power supply, and both units feature quiet fans for effective thermal management. The CORSAIR RM650e is equipped with a 120mm rifle bearing fan, designed to keep noise levels low even under full load. In contrast, the JUSTOP also features a 12CM quiet cooling fan, although its specifications do not detail the fan type. While both offer quiet operation, the CORSAIR's design may provide more efficient cooling performance due to its advanced engineering.

Modular Design

The CORSAIR RM650e boasts a fully modular design, allowing users to connect only the cables necessary for their specific build. This feature not only helps in reducing cable clutter but also promotes improved airflow within the case. The JUSTOP, however, does not specify a modular design, which could lead to unnecessary cables being left in the system. For users who prioritise aesthetics and airflow, the modularity of the RM650e is a significant advantage.

Protection Features

Safety features are essential in power supplies, and both models come with various protection mechanisms. The JUSTOP Black 700W includes over voltage protection, over power protection, short circuit protection, and thermal overload cut-off protection, ensuring user safety and hardware protection. The CORSAIR RM650e also provides reliable power delivery with 105°C-rated capacitors, ensuring steady and dependable performance. While both units offer solid protection, the CORSAIR may have an edge in terms of overall reliability due to its higher-grade components.

Compatibility

Compatibility is crucial when selecting a power supply. The CORSAIR RM650e is compliant with the latest Intel ATX 3.1 standard, which supports PCIe 5.1, making it suitable for modern graphics cards and components. The JUSTOP Black 700W, compliant with Intel ATX 12V v.2.3 and EPS 12V v.2.92 standards, also ensures compatibility with a wide range of systems. However, users with cutting-edge hardware may find the CORSAIR's newer standards more appealing for future-proofing their builds.

Which should you buy?

Choosing between the CORSAIR RM650e and the JUSTOP Black 700W ultimately depends on your specific needs and budget. The CORSAIR offers superior features such as a fully modular design, higher efficiency, and certification, making it ideal for high-performance systems and users looking for reliability. However, at a significantly lower price, the JUSTOP presents an excellent option for those on a budget or for users building mid-range systems. If you prioritise quality and future-proofing, the CORSAIR is the better investment; for basic needs and cost efficiency, the JUSTOP is a smart choice.