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CORSAIR SF850 vs GameMax 750W Rampage Power Supply

Updated August 2026The CORSAIR SF850 is a superior choice for high-performance builds, while the GameMax 750W Rampage is a budget-friendly option for basic systems.

The CORSAIR SF850 is a superior choice for high-performance builds, while the GameMax 750W Rampage is a budget-friendly option for basic systems.

Why CORSAIR SF850 is better

Efficiency

80 PLUS Platinum rating vs 80 PLUS Bronze

Power Output

850W capacity vs 750W

Modular Design

Fully modular vs semi-modular

Why GameMax 750W Rampage Power Supply is better

Price

£45.80 vs £149.99

Cooling Fan Size

14cm fan vs 92mm fan

Entry-Level Option

Better for budget builds

Overall score

CORSAIR SF850
90
GameMax 750W Rampage Power Supply
65

Specifications

SpecCORSAIR SF850GameMax 750W Rampage Power Supply
BrandCorsairGAMEMAX
Certification80 PLUS Platinum80 PLUS Bronze
Cooling TypePWM Fan14cm Fan
Modular TypeFully ModularSemi-Modular
Capacitor TypeJapaneseJapanese TK

Dimension comparison

CORSAIR SF850GameMax 750W Rampage Power Supply

Introduction to Power Supplies

When choosing a power supply for your PC, the options can be overwhelming. In this comparison, we will look at the CORSAIR SF850 and the GameMax 750W Rampage Power Supply. The CORSAIR SF850 is priced at £149.99, while the GameMax offers a more budget-friendly option at £45.80. Both units cater to different needs and preferences, making it essential to evaluate their key features.

Brand Reputation and Reliability

Brand reputation plays a crucial role in power supply selection. Corsair is known for its high-quality components and reliability, which is reflected in the SF850's 80 PLUS Platinum rating. This certification indicates exceptional energy efficiency, with the ability to deliver consistent power. In contrast, GameMax's Rampage series, while offering reliable performance through its Japanese TK main capacitor, is rated at 80 PLUS Bronze, achieving efficiency levels of up to 88% at 50% load. Therefore, if brand trust and top-tier efficiency are paramount, the CORSAIR SF850 edges ahead.

Power Output and Efficiency

Power output and efficiency are vital for ensuring a stable and reliable gaming experience. The CORSAIR SF850 boasts a robust 850W capacity, making it suitable for high-performance builds, especially with the increasing demands of modern gaming. Conversely, the GameMax 750W Rampage provides a maximum output of 750W, which is adequate for a variety of systems but may limit potential upgrades for power-hungry components. With the SF850's higher power rating, users can feel more confident about their system's performance under load.

Modular Design and Cable Management

A power supply's modular design can significantly affect cable management and airflow within a PC case. The CORSAIR SF850 features a fully modular design, allowing users to connect only the cables they need, thus minimising clutter. This flexibility is particularly advantageous in small form-factor builds, where space is at a premium. On the other hand, the GameMax 750W Rampage is semi-modular, which means some cables are permanently attached. While this design can simplify installation, it may lead to less efficient cable management in tighter spaces. For those prioritising a clean and organised build, the CORSAIR SF850 is the superior choice.

Cooling Solutions

Effective cooling solutions are essential for maintaining optimal performance and longevity in power supplies. The CORSAIR SF850 incorporates a 92mm PWM cooling fan, designed to deliver powerful airflow while operating with low noise levels, thanks to its fluid dynamic bearing. In contrast, the GameMax Rampage features a larger 14cm cooling fan, which also aims to provide silent operation. However, larger fans can sometimes lead to a bulkier unit. While both power supplies offer impressive cooling solutions, the SF850’s fan technology may provide a slight edge in terms of noise reduction during high loads.

Compatibility and Standards

The compatibility of a power supply with current technology standards is crucial for future-proofing your investment. The CORSAIR SF850 is ATX 3.1 compliant and PCIe 5.1 ready, ensuring it can support the latest hardware advancements and resist transient power spikes. This makes it an ideal choice for users looking to build or upgrade their systems with cutting-edge components. In contrast, the GameMax 750W Rampage may not offer the same level of future compatibility, as it lacks the ATX 3.1 compliance. Therefore, for those who wish to invest in a power supply that will remain relevant for years to come, the CORSAIR SF850 is the more compelling option.

Price-to-Performance Ratio

Price is often a deciding factor in any purchase, especially when comparing two power supplies with such a vast price difference. At £149.99, the CORSAIR SF850 is significantly more expensive than the GameMax 750W Rampage, which comes in at just £45.80. While the CORSAIR model offers superior efficiency, power output, and advanced features, the GameMax provides a budget-friendly option for those with basic needs or for first-time builders. If you are looking for high performance and longevity, the investment in the SF850 may be justified, but for casual users or those on a tight budget, the Rampage presents a compelling alternative.

User Experience and Build Quality

User experience and build quality can greatly influence satisfaction with a power supply purchase. The CORSAIR SF850 is built with 105°C rated Japanese capacitors, which enhance reliability and performance in demanding conditions. Its compact form factor is designed for easy integration into small builds without sacrificing quality. The GameMax Rampage, while constructed with quality components, is positioned as a more entry-level option. The build quality is good for its price point, but it may not match the durability and performance consistency of the SF850. For users who value long-term reliability and premium components, the CORSAIR SF850 is the better choice.

Which should you buy?

Ultimately, the decision between the CORSAIR SF850 and the GameMax 750W Rampage Power Supply hinges on your specific needs and budget. If you require a high-performance, efficient power supply that supports the latest standards and offers superior build quality, the CORSAIR SF850 is an excellent investment at £149.99. However, if you are on a budget or only need a reliable power supply for a basic system, the GameMax 750W Rampage at £45.80 provides solid performance without breaking the bank. Assess your requirements carefully to choose the right power supply for your build.

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CORSAIR SF850 vs GameMax 750W Rampage Power Supply | versusfinder