CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply vs CORSAIR HX1500i

Price Comparison

The CORSAIR RM850x is priced at £124.40, making it significantly more affordable than the CORSAIR HX1500i, which costs £229.00. This price difference of £104.60 may be a decisive factor for budget-conscious consumers. While both power supplies offer high-quality features, the RM850x provides excellent value for those who do not require the additional power capacity of the HX1500i. The HX1500i, on the other hand, may appeal to users with more demanding power needs or those who prioritise advanced features.

Power Capacity

The CORSAIR RM850x delivers a robust 850 watts of power, suitable for most gaming rigs and high-performance PCs. In contrast, the CORSAIR HX1500i offers a significantly higher capacity of 1500 watts, ideal for extreme builds with multiple graphics cards or heavy-duty components. This makes the HX1500i a better choice for enthusiasts looking to future-proof their systems with extensive hardware configurations. The substantial difference in wattage underscores the importance of matching power supply capacity with system requirements.

Efficiency Ratings

Efficiency is a critical consideration in power supplies, and both the RM850x and HX1500i excel in this area. The RM850x boasts a Cybenetics Gold certification, achieving up to 91% efficiency. This high efficiency translates to lower power consumption, reduced noise, and cooler operating temperatures. Meanwhile, the HX1500i is also Intel ATX 3.1 certified, ensuring compliance with the latest standards and efficient performance. For users prioritising energy efficiency, both models are strong contenders, but the RM850x has the edge with its specific efficiency rating.

Modular Cabling

Both power supplies feature fully modular cabling, allowing users to connect only the cables necessary for their systems. This design promotes cleaner builds and better airflow. The RM850x's modularity ensures that only required cables are used, reducing clutter. The HX1500i also facilitates tidy installations with its fully modular system. This common feature means that users of either power supply can achieve aesthetically pleasing setups while optimising airflow, making it easier to manage cables without excess.

Cooling Performance

Cooling performance is crucial for maintaining system stability, and both the RM850x and HX1500i come equipped with efficient fan systems. The RM850x utilises a 140mm fan designed for low noise operation, which helps maintain a quiet environment during heavy use. Conversely, the HX1500i features a similar 140mm Fluid Dynamic Bearing fan, which is noted for its extremely quiet and long-lasting performance. An added advantage of the HX1500i is its Zero RPM Fan Mode, which allows the fan to switch off entirely under low to medium loads, enhancing silent operation even further. This makes the HX1500i particularly appealing for users who value quiet computing.

Software Features

The CORSAIR HX1500i stands out with its powerful CORSAIR iCUE software, which enables users to create custom fan curves, monitor power settings, and adjust overcurrent protection settings on-the-fly. This level of control can be invaluable for enthusiasts looking to optimise their systems. In contrast, the RM850x does not mention any software integration, which may limit its appeal to users who enjoy customisation and monitoring capabilities. Thus, if software features are a priority, the HX1500i offers a more advanced solution.

Compatibility and Connectivity

Both power supplies are ATX 3.1 compliant, ensuring compatibility with the latest hardware, including PCIe 5.1. The RM850x includes a native 12V-2x6 connector, which guarantees a direct connection to the latest graphics cards without the need for adapters. This feature can simplify installation and improve compatibility with modern GPUs. The HX1500i also supports the latest standards and is designed to resist transient power spikes, making both units reliable choices for contemporary builds. However, the specific connector advantage of the RM850x may appeal to those using the latest graphics technology.

Which should you buy?

Choosing between the CORSAIR RM850x and the CORSAIR HX1500i ultimately depends on your specific needs. If you're looking for an efficient, cost-effective power supply that delivers excellent performance for typical gaming setups, the RM850x at £124.40 is a solid choice. However, if you require higher wattage for extensive builds or value advanced features like iCUE software and Zero RPM Fan Mode, the HX1500i, despite its higher price of £229.00, may be worth the investment. Consider your system requirements and preferences carefully to make the best decision.