CORSAIR SF1000 Fully Modular Low Noise 80 Plus vs Seasonic Focus GX 850W Power Supply ATX 3.1 PCIe

Price Comparison

The CORSAIR SF1000 is priced at $189.99, while the Seasonic Focus GX 850W is more affordable at $139.99. This makes the Seasonic about 26% cheaper than the CORSAIR model. If budget is a significant factor in your decision, the Seasonic offers substantial savings while still providing robust power for your system. However, the higher price of the CORSAIR SF1000 reflects its premium features and higher wattage capacity, which could justify the investment for power users or those with specific needs.

Power Output and Efficiency

The CORSAIR SF1000 delivers a high output of 1000W, making it suitable for demanding applications, especially in small form-factor builds. In contrast, the Seasonic Focus GX offers 850W of power. While this is still a significant amount, it may not be sufficient for users planning to run high-end GPUs or multiple components. Both power supplies boast high efficiency ratings, with the CORSAIR achieving an 80 PLUS Platinum certification, while the Seasonic is certified at 80 PLUS Gold and Cybenetics Platinum. This means that the CORSAIR may provide better efficiency, reducing energy waste and potentially lowering your electricity bill over time.

Form Factor and Compatibility

The CORSAIR SF1000 features a compact SFX form factor, making it ideal for small form-factor builds. It includes an SFX-to-ATX bracket, allowing for versatility in larger cases. On the other hand, the Seasonic Focus GX is designed as a standard ATX power supply. This makes it more suitable for traditional tower cases but less flexible for compact builds. Users with limited space may appreciate the compact design of the CORSAIR, while those with larger setups may not find the extra size of the Seasonic to be a drawback.

Modular Cabling

Both power supplies are fully modular, allowing users to connect only the cables they need, which can help with cable management and airflow within the PC case. The CORSAIR SF1000 utilizes Type-5 Micro-Fit PSU connectors, enhancing compatibility in small cases. The Seasonic Focus GX, while also modular, does not specify the type of connectors used, which may affect flexibility in certain builds. Effective cable management can lead to improved cooling and easier assembly, making this feature crucial for users who prioritize aesthetics and airflow.

Cooling Solutions

The CORSAIR SF1000 incorporates a 92mm PWM cooling fan, designed for low-noise operation, especially with its Zero RPM Mode that eliminates fan noise at low loads. This is a significant advantage for users who prioritize a quieter computing environment. The Seasonic Focus GX features a larger 135mm FDB fan with hybrid fan control. While it may be slightly louder under load, the larger fan can provide more effective cooling overall. Users who are sensitive to noise might lean towards the CORSAIR, while those who prioritize cooling efficiency may find the Seasonic's design appealing.

Build Quality and Components

The CORSAIR SF1000 is built with 105°C rated Japanese capacitors, ensuring reliability and performance under high-stress conditions. This premium component choice is indicative of the overall quality and durability of the power supply. Conversely, the Seasonic Focus GX also boasts high-quality components, though specific details about capacitor ratings are not provided. Both power supplies are designed to withstand demanding tasks, but the explicit mention of Japanese capacitors in the CORSAIR may give it an edge in perceived reliability and longevity.

Warranty and Support

The CORSAIR SF1000 comes with a seven-year warranty, providing peace of mind for users looking for long-term reliability. The Seasonic Focus GX offers an impressive ten-year warranty, which not only reflects confidence in its product quality but also adds significant value for potential buyers. A longer warranty can be a decisive factor for users who prioritize long-term use and support. While the CORSAIR provides a solid warranty, the Seasonic's longer coverage may appeal more to those looking for durability and extensive support.

Which should you buy?

When deciding between the CORSAIR SF1000 and the Seasonic Focus GX 850W, your choice will largely depend on your specific needs and budget. If you require high power output, compact form factor, and premium features, the CORSAIR SF1000 is worth the investment at $189.99. However, if you're looking for a more budget-friendly option that still offers robust performance and a longer warranty, the Seasonic Focus GX at $139.99 is an excellent choice. Ultimately, both power supplies offer unique advantages, making them suitable for different types of users and builds.