CORSAIR RM850e vs NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics P

Pricing Comparison

The pricing of the CORSAIR RM850e and the NZXT C850 SFX Gold reveals a notable difference, with the former being significantly more affordable. The CORSAIR RM850e is priced at £85.99, while the NZXT C850 SFX Gold comes in at £129.98. This £43.99 difference is substantial, especially for budget-conscious consumers. The lower price of the CORSAIR model may attract those looking for a reliable power supply without breaking the bank. However, the higher cost of the NZXT could be justified by its compact design and high efficiency ratings, which are vital for specific builds.

Design and Form Factor

The design and form factor are crucial considerations, particularly for users with limited space. The NZXT C850 SFX Gold utilises an SFX form factor, optimised for small form factor (SFF) cases, which can be a significant advantage in compact builds. In contrast, the CORSAIR RM850e does not specify a compact design but focuses on modularity. The fully modular design of the CORSAIR allows users to connect only the necessary cables, reducing clutter. Thus, while the NZXT is tailored for smaller setups, the CORSAIR offers flexibility in cable management.

Power Output and Efficiency

When it comes to power output, both power supplies deliver 850W, making them capable of supporting high-performance components. However, the efficiency ratings set them apart. The NZXT C850 SFX Gold boasts an 80 PLUS Gold certification alongside a Cybenetics Platinum efficiency rating, indicating superior performance in terms of energy use and heat output. The CORSAIR RM850e is also 80 PLUS certified but does not specify a higher efficiency rating. This means the NZXT may operate more efficiently, producing less heat and consuming less power over time.

Cooling Solutions

Cooling performance is another critical aspect where the two products differ. The NZXT C850 SFX Gold features a 92 mm fluid dynamic bearing (FDB) fan, which provides efficient cooling and operates in a Zero RPM mode for silent performance. This design is focused on maintaining a quiet system without compromising cooling efficiency. On the other hand, the CORSAIR RM850e uses a 120 mm rifle bearing fan, which is designed to keep noise levels down, even under full load. While both power supplies aim for quiet operation, the NZXT’s cooling solution appears more advanced, particularly for noise-sensitive environments.

Compatibility and Connectivity

Compatibility with modern graphics cards and components is vital for any power supply. The NZXT C850 SFX Gold is ATX 3.1 certified and includes a 600W 12V-2x6 connector, ensuring safe power delivery for modern graphics cards. This is particularly beneficial for high-end gaming setups. The CORSAIR RM850e is also Intel ATX 3.1 certified and can withstand transient power excursions from GPUs, making it equally capable in supporting demanding components. Both models are modern and compatible with the latest hardware, but the specific connectors in the NZXT may cater better to high-performance builds.

Noise Levels

Noise levels are an important factor for many users, especially those who prefer a silent operation. The NZXT C850 SFX Gold comes with a Cybenetics A- noise rating, indicating a quieter performance during operation. Its Zero RPM mode allows the fan to remain off under low load, significantly reducing noise. In comparison, the CORSAIR RM850e features a specially calculated fan curve that keeps noise levels down, but it does not specify a noise rating. For users prioritising a silent system, the NZXT's design offers a more compelling advantage.

Build Quality and Reliability

Both power supplies are designed for reliability, but their components vary slightly. The CORSAIR RM850e utilises 105°C-rated capacitors, which are known for delivering steady and dependable power. This specification indicates a focus on long-term reliability under load. The NZXT C850 SFX Gold, while not detailing capacitor ratings, focuses on low ripple noise, tight voltage regulation, and long hold-up time, ensuring stable performance. Both models are built with quality in mind, but the explicit rating of the CORSAIR suggests a potentially longer lifespan under demanding conditions.

Which should you buy?

In conclusion, the choice between the CORSAIR RM850e and the NZXT C850 SFX Gold will largely depend on your specific needs and budget. If you are looking for an affordable, reliable power supply with a fully modular design, the CORSAIR RM850e at £85.99 is an excellent option. However, if you require a compact power supply with higher efficiency ratings and quieter operation, the NZXT C850 SFX Gold, albeit at £129.98, may be worth the investment. Each power supply offers distinct advantages, so consider your system requirements and preferences before making a decision.