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be quiet! Pure Power 12 650W PSU | 80 Plus Gold | vs CORSAIR RM Series , RM650, Fully Modular Power Supply

Updated August 2026 — be quiet! Pure Power 12 650W PSU | 80 Plus Gold | wins on noise level and cooling, CORSAIR RM Series , RM650, Fully Modular Power Supply wins on modularity.

The be quiet! Pure Power 12 offers excellent value with quieter operation and lower price, while the CORSAIR RM Series provides more modularity and flexibility.

Why be quiet! Pure Power 12 650W PSU | 80 Plus Gold | is better

Price

be quiet! is 53% cheaper than CORSAIR

Noise Level

be quiet! features a quieter 120mm fan

Efficiency

be quiet! achieves up to 92.7% efficiency

Why CORSAIR RM Series , RM650, Fully Modular Power Supply is better

Modularity

CORSAIR is fully modular for better cable management

Fan Size

CORSAIR has a larger 140mm fan for cooling

Capacitors

CORSAIR uses industrial-grade 105°C-rated capacitors

Overall score

be quiet! Pure Power 12 650W PSU | 80 Plus Gold |
85
CORSAIR RM Series , RM650, Fully Modular Power Supply
78

Specifications

Specbe quiet! Pure Power 12 650W PSU | 80 Plus Gold |CORSAIR RM Series , RM650, Fully Modular Power Supply
Power650W650W
Certification80 PLUS Gold80 PLUS Gold
Cooling Fan120mm140mm
Connectors2 PCIe 6+24 PCIe 8-pin
Noise LevelVery QuietLow Noise

Dimension comparison

be quiet! Pure Power 12 650W PSU | 80 Plus Gold |CORSAIR RM Series , RM650, Fully Modular Power Supply

Overview of be quiet! Pure Power 12 650W PSU and CORSAIR RM Series

The be quiet! Pure Power 12 650W PSU is priced at $64.90, making it about 53% cheaper than the CORSAIR RM Series, which costs $138.31. Both power supplies are designed for high performance and efficiency, but they cater to different needs and preferences in the gaming and PC building communities.

The be quiet! Pure Power 12 delivers an impressive 80 PLUS Gold certification with efficiency ratings reaching up to 92.7%. This translates to lower power consumption and reduced operational costs. In contrast, the CORSAIR RM Series also boasts an 80 PLUS Gold rating, ensuring efficient power delivery. However, the higher price tag may cause some buyers to question whether the additional features justify the cost.

Design and Build Quality

The build quality of both power supplies reflects their respective brands' commitment to reliability. The be quiet! Pure Power 12 features a sleek black design with flat modular cables that enhance airflow and simplify installation. It has a temperature-controlled 120mm fan designed for quiet operation, making it ideal for quiet builds.

On the other hand, the CORSAIR RM Series is fully modular, allowing users to connect only the cables they need, which can help reduce clutter inside the case. It incorporates a 140mm rifle bearing fan, optimized for low noise levels even under full load. While both units are built with quality in mind, users looking for quieter performance might lean towards the be quiet! model, whereas those who prioritize flexibility may prefer the CORSAIR.

Efficiency and Performance

Both power supplies excel in terms of efficiency, certified with an 80 PLUS Gold rating. The be quiet! Pure Power 12 achieves up to 92.7% efficiency, which not only means less energy waste but also less heat generation. This is particularly beneficial for users who want to maintain a cooler system while keeping energy bills low.

The CORSAIR RM Series also promises solid efficiency, but specific performance metrics, such as peak efficiency ratings, are not detailed in the provided data. Nevertheless, it features industrial-grade, 105°C-rated capacitors, which contribute to its reliability and performance over time. For those focused on minimizing energy consumption, the be quiet! model has a slight edge.

Compatibility and Connectivity

When it comes to compatibility, both power supplies offer robust options for modern builds. The be quiet! Pure Power 12 comes with two PCIe 6+2-pin connectors and a native 12V-2x6 connector for next-gen PCIe 5.1 graphics cards. This makes it highly versatile for current and future graphics cards.

Conversely, the CORSAIR RM Series includes triple EPS12V connectors and four PCIe 8-pin power connectors, ensuring it can support a vast array of high-performance components. While both units are well-equipped for modern gaming rigs, the choice may depend on specific hardware requirements. Users with a focus on future-proofing their systems might find the be quiet! model particularly appealing due to its support for the latest standards.

Cooling Solutions

Cooling is a critical aspect of any power supply, especially for high-performance systems. The be quiet! Pure Power 12 features a 120mm fan designed for silent operation, ensuring that noise levels are minimized, even under load. Its airflow-optimized fan blades reduce turbulence, making it an excellent choice for users who prioritize a quiet computing environment.

The CORSAIR RM Series integrates a 140mm rifle bearing fan with a tailored fan curve to keep noise levels low, particularly during low to medium loads. Additionally, it offers a Zero RPM fan mode, further enhancing silent operation. Both cooling solutions are effective, but users who prioritize absolute quietness may still lean towards the be quiet! model due to its design ethos.

Warranty and Reliability

Reliability is often a deciding factor when choosing a power supply, and both brands offer substantial warranties. The be quiet! Pure Power 12 comes with a generous 10-year warranty, indicating the manufacturer’s confidence in its longevity and performance. Such extended coverage is reassuring for users planning to invest in a system for the long term.

The CORSAIR RM Series also offers a 10-year warranty, ensuring peace of mind regarding its reliability. Both power supplies are built with quality components, but the extended warranty from both brands highlights their commitment to durability, making either choice a safe bet in terms of long-term performance.

Pricing and Value for Money

The pricing difference between the two models is significant, with the be quiet! Pure Power 12 priced at $64.90 and the CORSAIR RM Series at $138.31. This represents a difference of about 53%, making the be quiet! model the more budget-friendly option for those looking to build a high-performance system without breaking the bank.

In terms of value for money, the be quiet! Pure Power 12 offers excellent features and performance at a lower price point. However, the CORSAIR RM Series may justify its higher price with its fully modular design and additional compatibility options. Ultimately, the best value will depend on the specific needs and priorities of the user.

Which should you buy?

Choosing between the be quiet! Pure Power 12 650W PSU and the CORSAIR RM Series largely depends on individual preferences and system requirements. The be quiet! model stands out for its lower price, quieter operation, and excellent efficiency ratings. It's particularly suited for users looking for a reliable and silent power supply without spending too much.

On the other hand, the CORSAIR RM Series offers flexibility with its fully modular design and may appeal to those with more demanding connectivity needs. It is a solid choice for users who prioritize extensive compatibility and are willing to invest more for additional features.

In conclusion, if budget and quiet operation are your main concerns, the be quiet! Pure Power 12 is the better option. However, if you require extensive connectivity and modularity, the CORSAIR RM Series may be worth the investment.