Corsair HX1000i Fully Modular Ultra-Low Noise ATX vs CORSAIR RM Series , RM650, Fully Modular Power Supply

Overview of the Products

The Corsair HX1000i and the CORSAIR RM Series (2021) RM650 are two high-quality power supplies from the same brand, but they cater to different user needs. The HX1000i is priced at $234.99, while the RM650 is more budget-friendly at $138.31, making it about 41% cheaper. Both power supplies are fully modular, allowing users to connect only the cables necessary for their systems, which contributes to cleaner builds and improved airflow.

Efficiency and Performance

The HX1000i boasts an impressive 80 PLUS Platinum efficiency rating, which signifies better energy use and lower electricity bills over time. In contrast, the RM650 offers an 80 PLUS Gold rating, which, while still efficient, is a step down from the platinum standard. This translates to the HX1000i being more suitable for high-performance systems that require maximum efficiency under load. The HX1000i also features a fluid dynamic bearing fan for ultra-quiet operation, while the RM650 utilizes a rifle bearing fan, which is quieter than conventional fans but may not match the HX1000i's noise reduction capabilities.

Cooling Solutions

Both power supplies come equipped with a 140mm fan, but their technologies differ. The HX1000i features a fluid dynamic bearing fan, designed for long-lasting performance and minimal noise, particularly during intense operations. On the other hand, the RM650 uses a rifle bearing fan that has been optimized for low noise levels, even at full load. Each unit also includes a Zero RPM fan mode, allowing the fan to stay off during low to medium loads for silent operation. This means that while both products are designed to remain quiet, the HX1000i has a slight edge in terms of fan technology and overall cooling efficiency.

Software and Customization

The HX1000i offers advanced software capabilities through Corsair's iCUE, allowing users to create custom fan curves, monitor power settings, and switch between single to multi-rail overcurrent protection on-the-fly. This level of customization is particularly beneficial for enthusiasts who wish to fine-tune their systems. Conversely, the RM650 lacks this software integration, offering a more straightforward experience without the advanced features found in the HX1000i. If software customization is a priority, the HX1000i is clearly the better option.

Build Quality and Components

Both power supplies are built with high-quality components, but the HX1000i features Japanese 105°C-rated electrolytic capacitors, which are known for their reliability and longevity. This is coupled with a ten-year warranty, underscoring Corsair's confidence in the product's durability. The RM650 also comes with 105°C-rated capacitors, but the overall component quality and warranty period are slightly less robust than those of the HX1000i. For users who prioritize long-term reliability, the HX1000i stands out as the more dependable choice.

Connectivity Options

When it comes to connectivity, the HX1000i offers extensive compatibility with modern systems. It supports the ATX 3.1 power standard and PCIe Gen 5.1, making it future-proof for upcoming technologies. It also has all the necessary connections to power demanding PC upgrades. The RM650, while still fully modular and equipped with triple EPS12V connectors, may not offer the same level of future-proofing as the HX1000i. For users looking to invest in their systems for the long haul, the HX1000i provides a more comprehensive set of connectivity options.

Pricing Comparison

At $234.99, the HX1000i is considerably more expensive than the RM650, which retails for $138.31. This price difference of approximately $96.68 means that the RM650 is about 41% cheaper than the HX1000i. While the HX1000i offers premium features and higher efficiency, the RM650 still delivers solid performance at a lower price point. For budget-conscious consumers or those with less demanding power needs, the RM650 is an attractive option without sacrificing essential performance.

Which should you buy?

Choosing between the Corsair HX1000i and the CORSAIR RM Series (2021) RM650 ultimately depends on your specific needs and budget. If you require a high-efficiency power supply with advanced software features, superior cooling technology, and extensive connectivity options, the HX1000i is worth the investment at $234.99. However, if you are looking for a reliable and efficient power supply at a significantly lower price of $138.31, the RM650 is a fantastic choice that still delivers solid performance for most users.