CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX vs CORSAIR RM850x Fully Modular Low-Noise ATX Power

Price Comparison

The CORSAIR CX550 is about 59% cheaper than the CORSAIR RM850x, making it a compelling option for budget-conscious users. Priced at $65.99, the CX550 offers solid performance for less demanding builds, while the RM850x, priced at $161.93, caters to high-performance setups. This significant price difference reflects the varying features and capabilities of each power supply, with the RM850x justifying its higher cost through advanced technology and efficiency ratings.

Efficiency Ratings

Efficiency is a critical aspect of power supplies, and here the RM850x shines with a Cybenetics Gold certification, boasting up to 91% efficiency. In contrast, the CX550 provides an 80 PLUS Bronze rating, ensuring up to 88% efficiency. While both units deliver power efficiently, the RM850x's higher rating means it generates less heat and consumes less power during operation, ultimately leading to lower energy costs over time. This efficiency can be a deciding factor for users looking to reduce their electricity bills in the long run.

Modular Design

The modular design of the RM850x offers greater flexibility and improved cable management compared to the non-modular CX550. With fully modular cabling, users can connect only the necessary cables for their specific builds, reducing clutter and enhancing airflow within the case. On the other hand, the CX550's non-modular design requires all cables to be connected, which can lead to unnecessary clutter and potential airflow issues. For builders prioritizing aesthetics and organization, the RM850x stands out as the better option.

Cooling Solutions

Both power supplies feature low-noise cooling solutions, but the RM850x has a more advanced cooling system. The RM850x comes equipped with a 140mm FDB fan, which is designed to provide efficient cooling while maintaining low noise levels. In comparison, the CX550 utilizes a 120mm thermally controlled fan that only spins at higher speeds under load, but may not be as effective in maintaining lower temperatures during peak use. For users who prioritize silent operation and efficient thermal management, the RM850x is the superior choice.

Compatibility and Future-Proofing

The RM850x is ATX 3.1 compliant and supports PCIe 5.1, making it better suited for future-proofing against upcoming hardware requirements. Its native 12V-2x6 connector allows for direct compatibility with the latest graphics cards without the need for adapters, ensuring a seamless build experience. In contrast, the CX550, while compatible with most components, does not offer the same future-ready features, potentially limiting its usability as new hardware comes to market. For gamers and PC builders looking to invest in long-term performance, the RM850x is the clear winner.

Warranty and Support

The warranty period is another important consideration, with the RM850x offering a ten-year warranty compared to the three-year warranty of the CX550. A longer warranty often signifies a manufacturer’s confidence in their product's durability and performance. This extended coverage can provide peace of mind for users investing in higher-end components, as they can rely on support and replacement if issues arise. In this regard, the RM850x enhances its appeal as a premium choice for serious builders.

User Experience

Both power supplies are designed to provide a reliable power source, but the RM850x enhances the user experience with features that cater to modern gaming and productivity needs. Its fully modular design simplifies installation, and the embossed cables with low-profile combs not only look sleek but also facilitate easy connections. The CX550, while effective for standard builds, might not deliver the same level of user-friendly features, particularly for those who value an organized setup. Overall, the RM850x offers a more tailored and enjoyable experience for users who demand more from their power supply.

Which should you buy?

In conclusion, the choice between the CORSAIR CX550 and the CORSAIR RM850x largely depends on your specific needs and budget. If you’re looking for an economical option that delivers solid performance for basic builds, the CX550, priced at $65.99, is a great choice. However, for those who seek advanced features, higher efficiency, and a future-proof design, the RM850x, priced at $161.93, is worth the investment. Ultimately, the RM850x offers superior performance and longevity, making it the better option for high-demand systems.