CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply vs NZXT C850 Gold Core - 850W ATX 3.1 Power Supply - 80 PLUS Gold - Cybenetics Plat

Overview of the Products

In this comparison, we will analyse the CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply and the NZXT C850 Gold Core - 850W ATX 3.1 Power Supply. Both power supplies are designed for high-performance systems, but they differ in features, efficiency ratings, and pricing. The CORSAIR product is priced at £124.40, while the NZXT model is more budget-friendly at £89.99.

Design and Build Quality

Both the CORSAIR RM850x and the NZXT C850 Gold Core feature fully modular designs, allowing users to connect only the cables they need for their specific build. This design not only reduces clutter within the case but also enhances airflow. The CORSAIR model boasts embossed cables with low-profile combs, which contribute to a sleek appearance and easy installation. In contrast, the NZXT power supply is equipped with a dual-colour 12V-2x6 connector, specifically designed to support modern NVIDIA graphics cards. This thoughtful design ensures stable and efficient power delivery to next-generation GPUs.

Efficiency Ratings

Efficiency is a crucial factor when selecting a power supply, and here both products stand out. The CORSAIR RM850x is Cybenetics Gold-Certified, achieving up to 91% efficiency. This high efficiency means lower power consumption and cooler operational temperatures, which is particularly beneficial for high-performance systems. On the other hand, the NZXT C850 Gold Core claims an 80 PLUS Gold and Cybenetics Platinum efficiency rating. While both have excellent efficiency, the CORSAIR unit slightly edges out with a precise percentage, making it a more efficient choice overall.

Noise Levels

Noise output is an important consideration for many users, especially those building quiet systems. The CORSAIR RM850x is designed for low-noise operation, although specific dBA ratings are not provided. The NZXT C850, however, is Cybenetics noise certified for near-silent performance, achieving an A++ rating for its operation at less than 15 dBA. This makes the NZXT power supply an excellent option for users prioritising a silent computing experience, particularly during light workloads when its FDB fan can operate in Zero RPM mode.

Compatibility and Connectivity

Both power supplies are ATX 3.1 compliant, ensuring compatibility with the latest hardware standards. The CORSAIR RM850x is particularly notable for its native 12V-2x6 connector, allowing a direct connection to the latest graphics cards without the need for an adapter. The NZXT C850 Gold Core also supports this connection type but adds versatility with up to three 8-pin PCIe cables, making it compatible with a broader range of GPUs. This flexibility can be a deciding factor for users with specific hardware requirements.

Thermal Performance

Thermal management is essential for maintaining system stability and longevity. The CORSAIR RM850x is designed to run cooler due to its efficiency rating, which translates into less heat generation during operation. The NZXT C850 Gold Core also focuses on thermal performance, featuring a 135 mm fluid dynamic bearing fan that ensures efficient cooling. Both units are designed to handle demanding loads well, but the CORSAIR’s higher efficiency gives it a slight advantage in maintaining lower temperatures.

Price Comparison

Price can often be the deciding factor between two comparable products. The CORSAIR RM850x is priced at £124.40, reflecting its premium features and high efficiency. Conversely, the NZXT C850 Gold Core is available for £89.99, making it a more economical choice for budget-conscious consumers. While the CORSAIR offers additional features, the NZXT provides a solid balance of performance and affordability, making it an attractive option for many users.

Additional Features

Both power supplies come with features that enhance their usability. The CORSAIR RM850x includes embossed cables, which not only look good but also simplify the installation process. The NZXT C850 Gold Core, on the other hand, includes a whisper-quiet operation and a fan with Zero RPM mode, allowing for silent performance under light loads. These additional features can significantly influence user experience, catering to different preferences in system aesthetics and operational noise.

Which should you buy?

Choosing between the CORSAIR RM850x and the NZXT C850 Gold Core ultimately depends on your specific needs and budget. If you prioritise efficiency, build quality, and premium features, the CORSAIR RM850x is the better choice despite its higher price of £124.40. However, if you're looking for a more cost-effective solution that still delivers excellent performance and silent operation, the NZXT C850 Gold Core at £89.99 is an outstanding option. Your decision will hinge on whether the additional features of the CORSAIR justify the price difference for your particular setup.