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CORSAIR SF850 vs Be Quiet! Pure Power 13M ATX 3.1-850w - 80 Plus Gold

Updated August 2026The CORSAIR SF850 is a superior choice for high-performance builds, while the Be Quiet! Pure Power 13M offers great value for budget users.

The CORSAIR SF850 is a superior choice for high-performance builds, while the Be Quiet! Pure Power 13M offers great value for budget users.

Why CORSAIR SF850 is better

Efficiency

SF850 has an 80 PLUS Platinum rating compared to the Gold rating of Pure Power 13M.

Modularity

SF850 features a fully modular design for better cable management.

Cooling

SF850 includes a 92mm PWM cooling fan for low-noise operation.

Why Be Quiet! Pure Power 13M ATX 3.1-850w - 80 Plus Gold is better

Price

Pure Power 13M is more budget-friendly at £108.79.

Form Factor

Pure Power 13M uses a traditional ATX form factor, compatible with more cases.

Brand Reputation

Be Quiet! is known for producing quiet components.

Overall score

CORSAIR SF850
85
Be Quiet! Pure Power 13M ATX 3.1-850w - 80 Plus Gold
70

Specifications

SpecCORSAIR SF850Be Quiet! Pure Power 13M ATX 3.1-850w - 80 Plus Gold
BrandCorsairbe quiet!
Current Price£149.99£108.79
Efficiency Rating80 PLUS Platinum80 PLUS Gold
Cooling Fan Size92mmN/A
Modular DesignFully ModularNon-Modular

Dimension comparison

CORSAIR SF850Be Quiet! Pure Power 13M ATX 3.1-850w - 80 Plus Gold

Overview of the CORSAIR SF850 and Be Quiet! Pure Power 13M

When comparing the CORSAIR SF850 and the Be Quiet! Pure Power 13M, the first distinction is their price points. The CORSAIR SF850 is priced at £149.99, whereas the Be Quiet! Pure Power 13M is more budget-friendly at £108.79. This price difference of £41.20 raises questions about the additional features and performance capabilities that justify the higher cost of the CORSAIR offering.

Both power supplies are designed for different user needs, with the SF850 catering to high-performance compact builds and the Pure Power 13M targeting general users who require reliable power without the premium features. Understanding these differences is essential for making an informed choice.

Power Efficiency Ratings

The CORSAIR SF850 boasts an 80 PLUS Platinum rating, indicating superior energy efficiency compared to the Be Quiet! Pure Power 13M, which is rated at 80 PLUS Gold. The Platinum rating signifies that the SF850 converts at least 90% of AC power to DC power under typical loads, while the Gold rating guarantees a minimum efficiency of 87%. This means that users of the SF850 can expect lower energy costs over time and reduced heat output, making it a more efficient choice for high-performance systems.

In practical terms, the efficiency difference could translate into significant savings on electricity bills for users with high power demands, especially in small form factor builds where cooling and power management are crucial.

Form Factor and Compatibility

The CORSAIR SF850 is designed in a compact SFX form factor, which is ideal for small-form-factor PCs. This makes it particularly appealing for users looking to build powerful yet space-efficient systems. On the other hand, the Be Quiet! Pure Power 13M comes in the more traditional ATX form factor, which is widely compatible with standard PC cases.

The compact nature of the SF850 allows for more versatile placement options in tight spaces, making it a better fit for modern builds that prioritise aesthetics and space-saving designs. Users should consider their case dimensions and overall build requirements when choosing between these two power supplies.

Modular Design and Cable Management

The fully modular design of the CORSAIR SF850 allows users to connect only the cables they need, resulting in improved airflow and cleaner cable management within the case. This feature is particularly beneficial for gamers and content creators who often require optimal thermal performance.

In contrast, the Be Quiet! Pure Power 13M does not explicitly mention a modular design in its specifications. This could lead to excess unused cables cluttering the build, potentially impacting airflow and aesthetics. For users who value clean setups, the modularity of the SF850 provides a crucial advantage.

Cooling Solutions

Cooling is a vital aspect of power supplies, and the CORSAIR SF850 features a 92mm PWM cooling fan designed for low-noise operation. This fan ensures that the unit remains quiet even under load, which is essential for users who prioritise a silent computing experience.

The Be Quiet! Pure Power 13M does not provide specific details about its cooling mechanism, but the brand is known for producing quiet components. However, without explicit features outlined, it is difficult to gauge its performance in comparison to the SF850's well-defined cooling capabilities. For users who desire peace and quiet during operation, the SF850 has a clear edge.

Capacitor Quality and Reliability

The reliability of a power supply is often tied to the quality of its components. The CORSAIR SF850 utilises 105°C rated Japanese capacitors, which are known for their longevity and performance under stress. This factor contributes to the overall stability and reliability of the power supply, ensuring that it can handle high loads without failure.

On the other hand, the Be Quiet! Pure Power 13M does not specify the quality of its capacitors, making it challenging to assess its reliability in demanding scenarios. For users who want peace of mind regarding their systems' power delivery, the proven quality of the capacitors in the SF850 is a significant advantage.

User Target Audience

The target audiences for the CORSAIR SF850 and Be Quiet! Pure Power 13M differ significantly. The SF850 is aimed at enthusiasts and gamers who require high efficiency, compact design, and modularity for powerful builds. Its price reflects its premium features, making it suitable for users who are willing to invest in top-tier components.

Conversely, the Be Quiet! Pure Power 13M appeals to budget-conscious users who still want a reliable and efficient power supply. Its lower price point makes it ideal for general computing tasks and systems that do not demand the highest performance specifications. Understanding your own requirements can help clarify which model aligns best with your needs.

Which should you buy?

Ultimately, the choice between the CORSAIR SF850 and the Be Quiet! Pure Power 13M comes down to your specific needs and budget. If you are building a high-performance small-form-factor PC and value modularity and efficiency, the CORSAIR SF850 is worth the investment at £149.99. However, if you are looking for a reliable power supply for a standard build without the need for premium features, the Be Quiet! Pure Power 13M offers excellent value at £108.79. Assess your priorities carefully to make the best decision for your setup.

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CORSAIR SF850 vs Be Quiet! Pure Power 13M ATX 3.1-850w - 80 Plus Gold | versusfinder