CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply vs Corsair HX1000i Fully Modular Ultra-Low Noise ATX Power Supply - ATX 3.1 & PCIe

Price Comparison

When evaluating the cost of the CORSAIR RM850x and the CORSAIR HX1000i, a clear distinction emerges. The RM850x is priced at £124.40, while the HX1000i commands a higher price of £169.99. This £45.59 difference may influence your decision based on budget constraints. If you're looking for a more economical option without sacrificing essential features, the RM850x is the more appealing choice. However, if you are willing to invest more for additional capabilities and advanced features, the HX1000i justifies its higher price tag.

Efficiency Ratings

The efficiency ratings of both power supplies reflect their performance capabilities. The RM850x is Cybenetics Gold-Certified, achieving an impressive efficiency rating of up to 91%. This high level of efficiency translates to reduced power consumption, lower noise levels, and cooler operating temperatures. In comparison, the HX1000i is Intel ATX 3.1 Certified, indicating compliance with the latest power standards but does not specify a precise efficiency rating. While both units are efficient, the RM850x offers a quantifiable advantage in this category.

Modularity Features

Modularity is a significant aspect to consider, and both power supplies excel in this regard. The RM850x features fully modular cabling, allowing users to connect only the cables necessary for their system. This feature aids in a cleaner build and improved airflow within the case. Similarly, the HX1000i also boasts fully modular cabling, making it easy to customise connections. Both products facilitate tidy setups, yet the RM850x presents a slightly simpler approach without the added software complexity found in the HX1000i.

Cooling Solutions

Both power supplies provide robust cooling mechanisms, but they approach it differently. The RM850x is designed with a low-noise operation in mind, ensuring that your system runs quietly. Meanwhile, the HX1000i enhances its cooling capabilities with a 140mm Fluid Dynamic Bearing fan that promises extremely quiet and long-lasting performance. Additionally, the HX1000i features a Zero RPM Fan Mode, allowing the fan to switch off entirely under low and medium loads for even quieter operation. If silent performance is a priority, the HX1000i may have the upper hand.

Software Integration

The integration of software is a unique feature found in the HX1000i. With the powerful CORSAIR iCUE software, users can create custom fan curves, monitor power settings, and toggle between single to multi-rail overcurrent protection on the fly. This level of control can be particularly beneficial for users seeking to optimise their cooling performance actively. In contrast, the RM850x does not offer any software integration, which may limit its appeal to those who prefer more manual control over their power supply settings.

Compatibility and Future-Proofing

In terms of compatibility, both power supplies are compliant with the ATX 3.1 power standard, supporting PCIe 5.1, which is essential for modern graphics cards. The RM850x features a native 12V-2x6 connector, ensuring a direct connection to the latest GPUs without the need for adapters. This feature is particularly beneficial for users looking to build or upgrade their systems without compatibility issues. The HX1000i also supports the same standards, ensuring that both products are future-proofed for upcoming hardware advancements.

Build Quality and Design

Both the CORSAIR RM850x and HX1000i exhibit excellent build quality, characteristic of the Corsair brand. The RM850x utilises embossed cables with low-profile combs, enhancing the aesthetics of your build while maintaining flexibility for easier installation. The HX1000i, on the other hand, not only features a similar fully modular design but also incorporates a more advanced cooling fan and aesthetic software integration. While both units look great, the HX1000i's additional features and design elements may appeal more to enthusiasts looking for a premium experience.

Which should you buy?

Choosing between the CORSAIR RM850x and the CORSAIR HX1000i ultimately depends on your specific needs and budget. If you are seeking a cost-effective, efficient power supply that offers solid performance without unnecessary frills, the RM850x is the clear choice at £124.40. However, if you are willing to invest more for enhanced cooling options, software integration, and advanced features, the HX1000i, priced at £169.99, offers significant advantages that may justify the higher cost. Your decision should align with your priorities, whether they be budget-friendly performance or premium functionality.