CORSAIR RM850e vs Corsair HX1000i Fully Modular Ultra-Low Noise ATX Power Supply - ATX 3.1 & PCIe

Pricing Comparison

The pricing between the CORSAIR RM850e and the Corsair HX1000i shows a significant difference, with the RM850e priced at £85.99, while the HX1000i is nearly double at £169.99. This price disparity indicates that the HX1000i is a premium offering, likely reflecting its additional features and capabilities. If budget constraints are a primary concern, the RM850e provides excellent value without compromising on essential performance metrics. However, the HX1000i justifies its higher price with advanced technologies and features that may appeal to more demanding users.

Modular Design

Both power supplies feature fully modular cabling, allowing users to connect only the cables necessary for their system builds. This design not only promotes a cleaner build but also improves airflow within the case. The RM850e focuses on providing reliability and efficiency, while the HX1000i enhances this by also offering customisation through powerful CORSAIR iCUE software, which allows users to create tailored fan curves and monitor power settings. This added flexibility may be crucial for those who wish to optimise their system's performance further.

Efficiency and Certification

Both the CORSAIR RM850e and the Corsair HX1000i are Intel ATX 3.1 certified, ensuring compliance with the latest power standards. This certification means that both units can handle the demands of modern GPUs and resist transient power spikes. The RM850e is designed for reliable performance with 105°C-rated capacitors, whereas the HX1000i offers additional features, such as the Zero RPM Fan Mode, which allows for silent operation under low to medium loads. This efficiency can significantly affect power consumption, particularly in systems that experience variable loads.

Cooling Performance

Cooling performance is a critical aspect of any power supply. The RM850e utilises a 120mm rifle bearing fan, which is engineered to keep noise levels low, even under full load. In contrast, the HX1000i features a larger 140mm Fluid Dynamic Bearing (FDB) fan, which not only provides quiet operation but is also designed for longevity. The HX1000i's Zero RPM Fan Mode further enhances its cooling capabilities by switching off the fan at lower loads, ensuring near-silent operation. This may be particularly appealing for users who value a quiet computing environment.

Technology and Features

The CORSAIR HX1000i stands out with its integration of CORSAIR iCUE software, which provides users with the ability to monitor and control their power supply settings in real-time. This feature is absent in the RM850e, which, while effective, does not offer the same level of customisation. The HX1000i's ability to toggle between single to multi-rail overcurrent protection (OCP) on the fly adds an extra layer of safety and flexibility that can be a decisive factor for enthusiasts or gamers pushing their systems to the limit.

Reliability and Build Quality

Both power supplies are built with reliability in mind, featuring high-quality components. The RM850e's 105°C-rated capacitors ensure steady and dependable power delivery, which is essential for system stability. On the other hand, the HX1000i not only matches this reliability but also enhances it with its advanced fan and monitoring features. The combination of a robust design and intelligent cooling in the HX1000i may make it a more appealing choice for users who prioritise longevity and consistent performance under demanding conditions.

User Experience and Installation

User experience can vary significantly between the two models. The fully modular design in both units simplifies installation, making it easier for users to manage cables and maintain airflow. The RM850e's straightforward approach is well-suited for users who prefer simplicity, while the HX1000i’s integration with iCUE software may cater to more tech-savvy users who enjoy customisation. Overall, both power supplies offer a user-friendly experience, but the added features of the HX1000i may provide a more tailored setup for those willing to invest the time.

Which should you buy?

Choosing between the CORSAIR RM850e and the Corsair HX1000i ultimately depends on your specific needs and budget. The RM850e offers excellent performance and value for users seeking a reliable power supply without the need for advanced features, priced at £85.99. Conversely, the HX1000i, at £169.99, is ideal for enthusiasts who require superior cooling, customisation options, and the latest technological advancements. If you prioritise performance and features, the HX1000i is worth the investment; however, if you are looking for a solid and efficient power supply without breaking the bank, the RM850e remains a commendable choice.