CORSAIR SF850 vs Seasonic Prime TX-1600 Noctua Edition

Price Comparison

When it comes to price, the CORSAIR SF850 is significantly more affordable at £149.99 compared to the Seasonic Prime TX-1600 Noctua Edition, which retails for £429.00. This represents a staggering £279.01 difference, making the CORSAIR model a budget-friendly option for users looking for high-quality power supply without breaking the bank. The price gap is considerable, which may lead budget-conscious consumers to favour the SF850, especially those building smaller form-factor PCs where high efficiency is essential.

Power Rating and Efficiency

The CORSAIR SF850 offers an 850W power rating, making it suitable for a wide range of gaming and workstation builds. In contrast, the Seasonic Prime TX-1600 boasts a higher power rating of 1600W, catering to high-performance workstations and gaming rigs that may house powerful graphics cards like the NVIDIA GeForce RTX 4090. While both power supplies are compliant with the ATX 3.1 standard, the higher wattage of the Seasonic can support more demanding hardware configurations, providing flexibility for future upgrades.

Modular Design

Both power supplies feature a fully modular design, allowing users to utilise only the cables they need, which results in a cleaner and more organised build. The CORSAIR SF850 employs Type-5 Micro-Fit PSU connectors, optimising space, particularly in compact cases. Meanwhile, the Seasonic Prime TX-1600 Noctua Edition showcases Noctua-themed cabling, enhancing the aesthetic appeal while maintaining functionality. This focus on modularity in both models is crucial for users who value cable management, particularly in systems with limited space.

Cooling Technology

Cooling performance is a critical aspect of any power supply, and both the CORSAIR SF850 and the Seasonic Prime TX-1600 excel in this area. The SF850 features a 92mm PWM cooling fan designed for low-noise operation, leveraging a fluid dynamic bearing for longevity and reduced sound levels. On the other hand, the Seasonic model is equipped with the renowned Noctua NF-A12x25 fan, which is certified Cybenetics Lambda A++ for ultra-low noise levels, operating at approximately 8-10dB(A) quieter than its counterparts. This makes the Seasonic an excellent choice for users prioritising silent operation in their builds.

Noise Levels

Noise levels from power supplies can greatly affect the overall experience of a PC build, especially in quiet environments. The CORSAIR SF850 is designed to keep noise minimal with its efficient cooling fan, but it does not have a specified semi-passive operation feature. In contrast, the Seasonic Prime TX-1600 Noctua Edition employs a semi-passive operation where the fan remains off until the load reaches 50% at ambient temperatures of up to 25°C. This feature allows for virtually noise-free operation under light loads, making it an ideal choice for users who desire silence during everyday tasks or low-intensity gaming.

Durability and Build Quality

Both power supplies are built with high-quality components designed to ensure reliability and longevity. The CORSAIR SF850 utilises 105°C rated Japanese capacitors, which are known for their stability and endurance under load. The Seasonic Prime TX-1600 Noctua Edition enhances this with titanium-level energy efficiency, achieving 94% efficiency at 50% load and carrying 80 PLUS Titanium and Cybenetics ETA Titanium certifications. This level of efficiency not only reduces power consumption but also waste heat, thereby extending the lifespan of the power supply.

Compatibility with Modern Standards

In terms of compatibility, both models are ATX 3.1 compliant and support the latest PCIe 5.1 standard, ensuring they can power the latest graphics cards and motherboards. The CORSAIR SF850 is particularly geared towards small form-factor builds, while the Seasonic Prime TX-1600 Noctua Edition, with its higher wattage, is aimed at more demanding systems. The Seasonic also includes a 12V-2×6 connector for safely powering high-end graphics cards, making it a more future-proof choice for enthusiasts planning to run top-tier hardware.

Which should you buy?

Choosing between the CORSAIR SF850 and the Seasonic Prime TX-1600 Noctua Edition ultimately depends on your specific needs and budget. The CORSAIR SF850 is a fantastic choice for users seeking an affordable, compact power supply that doesn’t compromise on efficiency or performance. Conversely, if you require a high-wattage solution for a top-tier gaming rig or workstation and value ultra-quiet operation, the Seasonic Prime TX-1600 Noctua Edition is worth the investment. Each power supply offers distinct advantages tailored to different user requirements, making it essential to assess your individual needs before making a decision.