CORSAIR HX1500i Fully Modular Ultra-Low Noise ATX vs CORSAIR RM850e Fully Modular Low-Noise ATX Power

Overview of Power Supplies

The CORSAIR HX1500i and CORSAIR RM850e are both highly regarded power supplies from Corsair, each offering unique strengths for different types of PC builds. The HX1500i is priced at $349.99, while the RM850e is significantly cheaper at $94.99, making it about 73% less expensive. This substantial price gap sets the stage for a deeper comparison of features, performance, and suitability for various users.

Power Efficiency

When it comes to power efficiency, the CORSAIR HX1500i stands out with its Cybenetics Platinum efficiency rating, ensuring exceptional power delivery with minimal waste. The RM850e, while still efficient, carries a Cybenetics Gold rating. This difference indicates that the HX1500i can offer slightly better performance in terms of energy consumption, making it a more suitable choice for those who prioritize efficiency in their builds. The HX1500i’s design allows it to achieve this high efficiency, which is particularly beneficial for users with demanding hardware setups.

Performance Under Load

The CORSAIR HX1500i is engineered to handle high loads with ease, thanks to its Intel ATX 3.1 certification and support for the PCIe Gen 5 platform. It features a 140mm Fluid Dynamic Bearing fan that operates quietly, even under substantial load, providing consistent cooling without excessive noise. In contrast, the RM850e features a 120mm rifle bearing fan, which also keeps noise levels low but may not perform as effectively under extreme conditions. Users with high-performance systems may find the HX1500i to be the better option when it comes to enduring heavy loads.

Modular Cabling

Both power supplies offer fully modular cabling, which allows users to connect only the cables necessary for their specific builds. The HX1500i excels with its capability to customize fan curves and monitor power settings through CORSAIR iCUE software. This software integration allows for greater control over the system's cooling and performance, a feature that may appeal to enthusiasts and those who enjoy optimizing their systems. While the RM850e also offers modular design, it lacks the advanced software capabilities that come with the HX1500i.

Noise Levels

The HX1500i is designed for ultra-low noise operation, featuring a Zero RPM Fan Mode that ensures the fan doesn’t spin up under low and medium loads, resulting in near-silent performance. This feature is particularly beneficial for users who prioritize a quiet computing environment. The RM850e, while also low-noise, operates with a specially calculated fan curve that may not achieve the same level of silence under lighter loads. For those who value a quiet PC experience, the HX1500i is likely the preferable choice.

Build Quality and Warranty

Both power supplies boast impressive build quality, but the HX1500i edges out with a ten-year warranty compared to the RM850e’s seven-year warranty. This longer warranty period reflects confidence in the HX1500i’s durability and reliability. Additionally, the HX1500i uses Japanese 105°C-rated electrolytic capacitors, which are known for their longevity and performance. While the RM850e also uses 105°C-rated capacitors, the assurance of a longer warranty with the HX1500i may sway some consumers towards it, especially those looking for long-term reliability.

Price Comparison

The most notable difference between the two power supplies is, of course, the price. The HX1500i is priced at $349.99, making it a premium option, while the RM850e comes in at a much more accessible $94.99. This price difference of about $255 is significant, and for many users, it will be a decisive factor. The RM850e provides a solid power solution without the advanced features of the HX1500i, making it a strong candidate for budget-conscious builders or those with less demanding setups.

Which should you buy?

Choosing between the CORSAIR HX1500i and CORSAIR RM850e ultimately depends on your specific needs and budget. If you require a high-efficiency power supply capable of handling demanding components with quiet operation and advanced software features, the HX1500i is the clear winner, despite its higher price. On the other hand, if you're looking for a reliable, budget-friendly option that still meets modern standards with solid performance, the RM850e is an excellent choice. Consider your system requirements and priorities to make the best decision for your setup.