Corsair HX1000i Fully Modular Ultra-Low Noise ATX Power Supply - ATX 3.1 & PCIe vs CORSAIR RM650e

Price Comparison

The Corsair HX1000i is priced at £169.99, whereas the CORSAIR RM650e is significantly more affordable at £79.99. The substantial difference of £90 indicates a distinct market positioning for these two power supplies, which may appeal to different segments of users. The HX1000i, being a higher-end model, offers features that cater to enthusiasts who require more power and advanced functionalities. In contrast, the RM650e is priced for those seeking reliable performance without the added premium features, making it a solid choice for budget-conscious consumers.

Power and Efficiency

The Corsair HX1000i delivers 1000 watts of power, making it an excellent choice for high-performance systems that necessitate substantial wattage, particularly in gaming and heavy computing scenarios. Meanwhile, the CORSAIR RM650e provides 650 watts, which is adequate for mainstream builds but may limit users looking to push their systems to higher performance thresholds. Both units are Intel ATX 3.1 certified, ensuring they meet modern power standards and can handle the latest PCIe 5.1 hardware configurations. This certification enhances their efficiency, but users requiring more power will find the HX1000i more suitable.

Modular Cabling

Both power supplies feature fully modular cabling, allowing users to connect only the cables necessary for their specific builds. This design helps in creating cleaner and more organised setups, which is essential for airflow and aesthetics. The HX1000i's modularity is complemented by a more advanced feature set, including the capability to manage power settings via the CORSAIR iCUE software. While the RM650e does not have this software integration, it still provides the flexibility of connecting only essential cables, making both units user-friendly for custom PC builders.

Cooling Solutions

Cooling performance is a critical aspect of any power supply, and both models excel in this area, albeit with different fan designs. The Corsair HX1000i features a 140mm Fluid Dynamic Bearing (FDB) fan, which is known for its quiet operation and longevity. It includes a Zero RPM Fan Mode that allows the fan to remain off under low and medium loads, resulting in near-silent operation. Conversely, the RM650e is equipped with a 120mm articulating bearing fan that is designed to keep noise levels low even under full load. While both systems focus on maintaining a quiet environment, the HX1000i has the edge in advanced cooling features.

Reliability and Build Quality

In terms of reliability, both power supplies are constructed with high-quality components. The HX1000i utilises premium capacitors, which are expected in a high-end model, ensuring consistent power delivery and longevity. The RM650e also boasts 105°C rated capacitors, reinforcing its solid build quality. Each unit comes with a significant warranty period; however, the specifics of the HX1000i's warranty are not mentioned, while the RM650e is backed by a seven-year warranty. This reflects a commitment to reliability and customer confidence, particularly for users concerned about long-term performance.

Noise Levels

Noise levels are an important consideration for PC builders, and both power supplies aim to minimise acoustic output. The Corsair HX1000i's 140mm fan operates silently at low loads, thanks to its Zero RPM Fan Mode. This feature ensures that the power supply remains quiet during less demanding tasks. On the other hand, the RM650e's fan is designed with a specially calculated curve to keep noise levels low, even at maximum load. While both units are engineered for quiet operation, users who prioritise silence may lean towards the HX1000i due to its advanced fan features.

Compatibility and Features

When it comes to compatibility, both power supplies are designed to support the latest hardware standards, including native PCIe 5.1 compliance. The HX1000i offers more extensive features, such as the CORSAIR iCUE software integration, allowing users to create custom fan curves and monitor power settings in real time. The RM650e, while compatible with modern systems, does not include such software capabilities. This difference may influence users who want a more interactive and customisable power supply experience.

Which should you buy?

Choosing between the Corsair HX1000i and the CORSAIR RM650e ultimately depends on your specific needs and budget. If you require a high-powered solution with advanced features, the HX1000i is the superior option, albeit at a higher price of £169.99. Alternatively, if you're looking for a reliable and efficient power supply at a lower price of £79.99, the RM650e provides excellent value while still meeting modern power standards. Assessing your system requirements and budget will guide you towards the best choice for your build.