CORSAIR SF850 vs NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics P

Overview of Power Supply Options

When considering power supplies, both the CORSAIR SF850 and the NZXT C850 SFX Gold present compelling options for compact builds. The CORSAIR SF850 is priced at £149.99, while the NZXT C850 SFX Gold is slightly more affordable at £129.98. This price difference may influence your choice depending on your budget and the features you prioritise.

The CORSAIR SF850 is an 80 PLUS Platinum rated power supply, indicating high efficiency and reliability, which could be crucial for demanding systems. On the other hand, the NZXT C850 SFX Gold boasts an 80 PLUS Gold rating, which, while slightly less efficient, still offers significant performance for modern builds.

Design and Form Factor

Both power supplies are designed in a compact SFX form factor, catering to small form factor (SFF) cases. However, the CORSAIR SF850 stands out with its 80 PLUS Platinum rating, making it an excellent choice for those who require maximum power efficiency in space-constrained environments.

The NZXT C850 SFX Gold also optimises space without compromising performance, specifically designed for compact builds. With a focus on reliability, its ATX 3.1 certification ensures sufficient power delivery, particularly for modern graphics cards. This feature may appeal to users planning to integrate high-performance GPUs into their systems.

Power Efficiency and Ratings

The efficiency ratings of these power supplies are a key differentiator. The CORSAIR SF850, with its 80 PLUS Platinum rating, is engineered to deliver superior power efficiency, reducing energy costs over time. Additionally, its compliance with the ATX 3.1 standard ensures it can handle transient power spikes effectively.

Conversely, the NZXT C850 SFX Gold, rated at 80 PLUS Gold, still provides excellent energy efficiency, albeit at a marginally lower level than its competitor. While this may suffice for many users, those looking for the utmost efficiency might lean towards the CORSAIR SF850.

Cooling Systems

In terms of cooling, both models feature a 92mm fan with fluid dynamic bearing (FDB) technology. The CORSAIR SF850 provides low-noise operation, which is paramount for users who value a quiet computing environment.

The NZXT C850 SFX Gold also emphasises quiet operation with its Cybenetics A- noise rating and includes a Zero RPM mode. This feature allows the fan to remain off during low-load situations, further enhancing silent performance. For users prioritising a quiet system, both options provide effective cooling solutions, but the unique features of each may sway your decision.

Connectivity and Modular Design

The CORSAIR SF850 offers a fully modular design, utilising Type-5 Micro-Fit PSU connectors. This feature allows for flexible cabling, which not only optimises space but also aids in tidy cable management, a significant advantage in compact builds.

The NZXT C850 SFX Gold also supports modular connections and includes a 600W 12V-2x6 connector for reliable GPU power. This ensures that users can connect modern graphics cards without compromising on power delivery. Both power supplies provide ample connectivity options, but the fully modular design of the CORSAIR SF850 may offer a slight edge in terms of aesthetic and functional flexibility.

Component Quality and Reliability

Component quality is crucial for the longevity of any power supply. The CORSAIR SF850 is equipped with 105°C rated Japanese capacitors, which enhance reliability and ensure stable performance under load. This premium component choice is indicative of the brand's commitment to durability.

In comparison, the NZXT C850 SFX Gold also focuses on reliability with features that minimise ripple noise and provide tight voltage regulation. This ensures stable power delivery and component protection. While both power supplies prioritise reliability, the high-quality capacitors in the CORSAIR SF850 might appeal more to users looking for superior durability.

Price Comparison

The pricing of these power supplies reflects their respective features and efficiencies. The CORSAIR SF850 is priced at £149.99, while the NZXT C850 SFX Gold is available for £129.98. This £20 difference may influence budget-conscious consumers who are looking for the best value for their money without sacrificing essential features.

While the CORSAIR SF850 offers higher efficiency and superior component quality, the NZXT C850 SFX Gold provides a solid performance at a lower price point, making it an attractive option for users who may not require the highest tier of efficiency.

Which should you buy?

Ultimately, the choice between the CORSAIR SF850 and the NZXT C850 SFX Gold will depend on your specific needs and budget. If you are looking for maximum efficiency, superior component quality, and are willing to invest a bit more, the CORSAIR SF850 is the ideal choice. However, if you are seeking a reliable power supply that offers excellent performance at a more affordable price, the NZXT C850 SFX Gold is an excellent alternative. Both power supplies cater well to compact builds, ensuring that your system runs smoothly and efficiently.