CORSAIR RM850e vs CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply

Overview of the CORSAIR RM850e and CORSAIR RM850x

The CORSAIR RM850e and CORSAIR RM850x are both fully modular power supplies designed for efficient and quiet operation. The RM850e is priced at £85.99, while the RM850x is more expensive at £124.40. Each model adheres to the ATX 3.1 power standard, but they differ in efficiency ratings and additional features.

The RM850e is a reliable option that focuses on providing essential power with efficient performance, while the RM850x boasts Cybenetics Gold certification for higher efficiency. This makes the RM850x a better choice for users prioritising energy savings and system cooling.

Build Quality and Design

Both the RM850e and RM850x feature a fully modular design, allowing users to connect only the cables necessary for their builds. This aspect enhances cable management, reduces clutter, and improves airflow within the PC case.

The RM850x stands out with its embossed cables designed with low-profile combs, giving it a sleek appearance while ensuring easy installation. The RM850e, while effective, does not highlight any unique cable design features, making the RM850x more visually appealing for those who value aesthetics alongside performance.

Efficiency Ratings

Efficiency is a crucial factor in power supply performance, and here the RM850x excels with its Cybenetics Gold certification. This model is rated for up to 91% efficiency, leading to reduced power consumption and lower heat generation.

In comparison, the RM850e does not specify an efficiency rating but is compliant with the ATX 3.1 standard, which suggests it provides reliable power delivery. However, without a specific efficiency rating, the RM850x is clearly the superior choice for users who want to ensure they're maximising energy savings.

Noise Levels

Both power supplies are engineered for quiet operation, but their noise management systems take different approaches. The RM850e utilises a 120mm rifle bearing fan that operates quietly, even under full load, making it an excellent choice for users concerned about noise levels.

The RM850x is also described as a low-noise power supply, but its efficiency rating may contribute to quieter operation overall due to less heat generation. While both units are designed to minimise noise, the RM850x's superior efficiency could potentially lead to even quieter performance in high-demand scenarios.

Compatibility and Connectivity

The RM850e and RM850x are both compliant with the ATX 3.1 standard, ensuring compatibility with modern components, including PCIe 5.1 graphics cards. However, the RM850x has a notable advantage with its native 12V-2x6 connector, which allows for a direct connection to the GPU without the need for any adapters.

This direct connection feature simplifies installation and enhances reliability, making the RM850x a better option for users with the latest hardware. The RM850e, while compatible, lacks this specific connector, which could be a deciding factor for users focused on future-proofing their systems.

Capacitor Quality

The quality of internal components can significantly affect a power supply's performance and longevity. The RM850e is equipped with 105°C-rated capacitors, which are designed to deliver stable power and dependable electrical performance. This rating indicates that the capacitors can handle higher temperatures, which contributes to their durability.

The RM850x, although not specifically mentioned in the data, is likely to have comparable quality components given its higher efficiency rating and premium positioning. Users looking for long-term reliability may find both units acceptable, but the RM850e explicitly states its capacitor quality, highlighting its reliability.

Pricing and Value for Money

The RM850e is priced at £85.99, making it a more budget-friendly option for those seeking a reliable power supply without breaking the bank. On the other hand, the RM850x is priced at £124.40, reflecting its enhanced features and higher efficiency rating.

While the RM850e offers solid performance for its price, the RM850x provides additional value through its efficiency, noise reduction, and improved connectivity options. Users willing to invest more can benefit from the RM850x's superior specifications, which may lead to long-term savings on energy costs.

Which should you buy?

Choosing between the CORSAIR RM850e and CORSAIR RM850x ultimately depends on your specific needs and budget. If you require a dependable power supply at a lower price, the RM850e at £85.99 is a viable option that delivers solid performance with essential features. However, if you are looking for higher efficiency, improved cooling, and enhanced connectivity options, the RM850x at £124.40 is worth the investment. Its Cybenetics Gold certification and native GPU connection make it a smarter choice for enthusiasts and those with high-performance builds.