CORSAIR SF850 vs NZXT C850 Gold Core - 850W ATX 3.1 Power Supply - 80 PLUS Gold - Cybenetics Plat

Pricing Comparison

When it comes to pricing, the NZXT C850 Gold Core is significantly more affordable than the CORSAIR SF850. The NZXT C850 is priced at £89.99, while the CORSAIR SF850 retails for £149.99. This £60 difference makes the NZXT model an attractive option for budget-conscious consumers looking for a high-quality power supply. While both power supplies are designed for efficient performance, the substantial price gap means that for those who need a reliable power source without breaking the bank, the NZXT C850 is a compelling choice.

Power Efficiency

In terms of power efficiency, the CORSAIR SF850 has an edge with its 80 PLUS Platinum rating compared to the NZXT C850's 80 PLUS Gold rating. The CORSAIR model's higher efficiency translates to less wasted energy and lower electricity bills, especially under heavy loads. The Platinum certification indicates that the CORSAIR SF850 operates at a minimum efficiency of 90% at 20% load and 92% at 50% load, while the NZXT C850's Gold rating signifies a minimum of 87% efficiency at 20% load and 90% at 50% load. For users prioritising energy conservation and long-term savings, the CORSAIR SF850 may be the more economical option over time.

Form Factor and Compatibility

The CORSAIR SF850 is designed in a compact SFX form factor, making it ideal for small-form-factor PCs or systems where space is at a premium. In contrast, the NZXT C850 is an ATX power supply, which is the standard size for most builds. This difference may influence the choice depending on the user's case dimensions and system requirements. The CORSAIR's SFX design allows for more flexible installation in tight spaces, while the NZXT's ATX size provides ample room for cable management and heat dissipation. Users with specific case configurations may find one option more suitable than the other based on these dimensions.

Cooling Solutions

Cooling efficiency is another critical aspect where both power supplies excel, albeit with different approaches. The CORSAIR SF850 features a 92mm PWM cooling fan designed for low-noise operation, ensuring that the power supply remains quiet while providing effective cooling. On the other hand, the NZXT C850 is equipped with a larger 135mm fluid dynamic bearing fan that also boasts a Zero RPM mode during light workloads, contributing to near-silent operation. While both cooling solutions are efficient, the NZXT's fan might offer better thermal management and quieter performance during idle conditions, making it a strong contender for users sensitive to noise levels.

Modular Design

Modularity can greatly impact cable management and installation ease, and here, both power supplies offer fully modular designs. The CORSAIR SF850 uses Type-5 micro-fit PSU connectors, which allow for flexible cabling and tidy installations, especially in compact cases. The NZXT C850 also features a fully modular setup, allowing users to connect only the cables they need, thereby reducing clutter. This modularity is particularly beneficial for enhancing airflow and improving aesthetics within the PC build. Both models excel in this area, catering to users who value neat and efficient setups.

GPU Compatibility

When considering compatibility with modern graphics cards, both power supplies are equipped to handle next-gen GPUs. The NZXT C850 is ATX 3.1 certified and PCIe 5.1 ready, featuring a dual-colour 12V-2x6 connector, ensuring safe and stable power delivery for contemporary NVIDIA graphics cards. The CORSAIR SF850 also supports the ATX 3.1 standard and is PCIe 5.1 ready, making it equally compatible with the latest GPU technology. Thus, users looking to future-proof their systems will find both options suitable for high-performance graphics setups, making this a non-differentiating factor in their decision.

Build Quality and Reliability

Build quality is paramount for power supplies, and both models are constructed with high-grade components. The CORSAIR SF850 utilises 105°C rated Japanese capacitors, which are known for their reliability and durability in providing consistent power. Similarly, the NZXT C850 boasts Cybenetics Platinum efficiency ratings, indicating its high-quality construction and performance under load. Both brands are well-regarded in the industry, and users can trust that either unit will provide stable power. However, the emphasis on Japanese capacitors in the CORSAIR model adds an extra layer of assurance regarding its longevity and performance.

Which should you buy?

In conclusion, the choice between the CORSAIR SF850 and the NZXT C850 Gold Core ultimately depends on your specific needs and budget. If you prioritise energy efficiency, compact design, and are willing to invest more upfront for potentially lower long-term costs, the CORSAIR SF850 is the superior option. However, if you're looking for a more budget-friendly power supply that still offers excellent performance, the NZXT C850 provides great value with its silent operation and compatibility with modern GPUs. Both power supplies are excellent choices, but your final decision should reflect your individual priorities in performance, price, and system compatibility.