CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX vs CORSAIR RM850e Fully Modular Low-Noise ATX Power

Overview of the Products

When comparing power supplies, the CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX 550 Watt Power Supply stands out for its cost-effectiveness, while the CORSAIR RM850e offers advanced features for high-performance builds. Priced at $65.99, the CX550 is about 30% cheaper than the RM850e, which retails for $94.99. This price difference reflects the varying targets of these two products—one is aimed at budget-conscious consumers, while the other caters to high-end gaming or workstation setups.

Efficiency Ratings

Efficiency is a critical factor when choosing a power supply. The CORSAIR CX550 is 80 PLUS Bronze certified, boasting up to 88% operational efficiency. This means it generates less heat and lowers energy costs compared to standard power supplies. On the other hand, the CORSAIR RM850e achieves Cybenetics Gold efficiency, which indicates even higher performance and energy savings, although the exact efficiency percentage isn’t specified. For users looking for long-term savings, the RM850e may prove to be a better investment despite its higher upfront cost.

Modular Design

The modularity of a power supply can significantly affect installation ease and airflow within the case. The CORSAIR RM850e features a fully modular design, allowing users to connect only the cables necessary for their specific build. This not only simplifies installation but also enhances cable management. In contrast, the CORSAIR CX550 is non-modular, meaning all cables are fixed, which could lead to clutter and less efficient airflow in the case. If a clean and tidy setup is a priority, the RM850e clearly has the advantage.

Noise Levels

Noise levels are often a concern for users aiming for a quiet computing environment. The CORSAIR CX550 incorporates a 120mm thermally controlled fan that operates quietly, spinning faster only under heavy loads. Similarly, the RM850e also utilizes a 120mm fan designed to keep noise levels low, even at full load. However, the RM850e's rifle bearing fan and specially calculated fan curve may provide a quieter experience overall, especially during demanding tasks. For noise-sensitive users, the RM850e may be the better option.

Compatibility and Future-Proofing

Compatibility with modern hardware is essential for any power supply. The CORSAIR RM850e is Intel ATX 3.1 certified and supports PCIe 5.1, which means it is well-suited for the latest GPUs and motherboards, capable of handling transient power excursions. This makes it a more future-proof choice for users planning to upgrade their systems. In contrast, the CORSAIR CX550, while capable for many current builds, may not support the latest technologies as effectively. For gamers and enthusiasts looking to invest in cutting-edge components, the RM850e is clearly the superior choice.

Build Quality and Components

The longevity and reliability of a power supply often depend on its internal components. The CORSAIR RM850e is equipped with 105°C-rated capacitors, which generally offer improved performance and durability, especially under stress. While the CX550 is also built with quality in mind, the absence of specific high-temperature ratings suggests it may not be as robust under demanding conditions. For users who plan to push their systems to the limit, the RM850e’s superior build quality provides peace of mind.

Warranty and Support

Warranty length can provide insight into the manufacturer's confidence in their product. The CORSAIR CX550 comes with a three-year warranty, while the RM850e is backed by a seven-year warranty. This substantial difference indicates a higher level of confidence from Corsair regarding the RM850e's longevity and reliability. For users who prioritize long-term support, the RM850e is the clear choice, offering a more extended safety net against potential issues.

Which should you buy?

Ultimately, choosing between the CORSAIR CX550 and the CORSAIR RM850e comes down to your specific needs and budget. If you are looking for a reliable, budget-friendly option for a standard build, the CX550 at $65.99 is a solid choice. However, for those looking to future-proof their systems with high-end components, the RM850e, despite its higher price of $94.99, offers advanced features, better efficiency, and a longer warranty. In summary, if performance and longevity are priorities, the RM850e is worth the investment; if budget constraints are a concern, the CX550 remains a dependable option.