CORSAIR SF850 vs be quiet! System Power 11 750W Power Supply

Price Comparison

When considering price, the be quiet! System Power 11 750W Power Supply is significantly more affordable at £64.99 compared to the CORSAIR SF850, which retails for £149.99. This represents a price difference of £85, making the be quiet! option a more budget-friendly choice for those looking for a reliable power supply without breaking the bank. However, the higher price of the CORSAIR SF850 may reflect its premium features and performance capabilities, which could justify the investment for enthusiasts or those with specific needs.

Power Output

In terms of power output, the CORSAIR SF850 offers an impressive 850W, which provides ample headroom for high-performance components, especially in compact builds. On the other hand, the be quiet! System Power 11 delivers a solid 750W, sufficient for most gaming and workstation setups. While the 100W difference may not seem significant for general use, the additional power from the CORSAIR could be a deciding factor for users planning to run demanding hardware or future upgrades.

Efficiency Rating

The efficiency of a power supply is crucial for energy savings and performance. The CORSAIR SF850 boasts an 80 PLUS Platinum certification, indicating an efficiency rating that exceeds 90% under typical load conditions. This premium efficiency not only helps in reducing electricity bills but also contributes to lower heat generation. In contrast, the be quiet! System Power 11 carries an 80 PLUS Bronze certification, with an efficiency rating of up to 90%. While the be quiet! model is still efficient, it does not match the premium efficiency of the CORSAIR, making the latter a more attractive option for eco-conscious and performance-driven users.

Form Factor

The form factor is another significant differentiation between the two models. The CORSAIR SF850 is designed in a compact SFX form-factor, making it ideal for small-form-factor PCs where space is at a premium. This feature allows for more flexible build configurations and better cable management. Conversely, the be quiet! System Power 11 is an ATX power supply, which is a standard size that fits most cases. While the ATX form factor provides compatibility with a wide range of builds, it does lack the space-saving advantages that the SFX design of the CORSAIR offers.

Modularity

Modularity can greatly influence the ease of installation and cable management. The CORSAIR SF850 is fully modular, which means you can connect only the cables you need for your build, reducing clutter and improving airflow. This design is particularly advantageous for users who prioritise aesthetics and neatness in their builds. In contrast, the be quiet! System Power 11 does not specify its modularity level, suggesting it may not have the same degree of flexibility in cable management. This could lead to more tangled cables and less efficient airflow, potentially impacting overall system performance.

Cooling Solutions

Cooling performance is vital for maintaining system stability. The CORSAIR SF850 features a 92mm PWM cooling fan, designed to operate quietly while providing excellent cooling capabilities. Its fluid dynamic bearing contributes to low noise levels, making it suitable for silent builds. The be quiet! System Power 11, on the other hand, is equipped with a temperature-controlled 120mm quality fan, which also aims for low noise operation. While both power supplies have good cooling solutions, the larger fan in the be quiet! model may offer slightly better cooling performance, though the overall effectiveness can vary based on specific system configurations.

Safety Features

Safety is paramount when selecting a power supply. The CORSAIR SF850 incorporates 105°C rated Japanese capacitors, which contribute to its reliability and stable power delivery under load. This high-quality component usage suggests a robust design aimed at longevity. The be quiet! System Power 11 also prioritises safety, featuring protections against overcurrents, over- and undervoltages, overtemperature, short circuits, and overloads. Both models provide extensive safety features; however, the use of higher-grade capacitors in the CORSAIR might offer an edge in terms of durability and reliability over time.

Which should you buy?

Choosing between the CORSAIR SF850 and the be quiet! System Power 11 ultimately depends on your specific needs and budget. If you require a compact, high-efficiency power supply with extensive modularity and superior performance, the CORSAIR SF850 justifies its higher price at £149.99. It is particularly suited for high-performance builds and users who want optimal cooling and reliability. Conversely, if you are looking for a more budget-friendly option that still provides solid performance and safety features, the be quiet! System Power 11 at £64.99 is a commendable choice. It offers ample power for most systems and prioritises quiet operation, making it a great option for everyday users.