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MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe vs GameMax 800W Rampage Power Supply

Updated August 2026The MONTECH Century II offers superior efficiency and build quality, making it the better choice for high-performance users. The GameMax Rampage is a solid budget option for entry-level systems.

The MONTECH Century II offers superior efficiency and build quality, making it the better choice for high-performance users. The GameMax Rampage is a solid budget option for entry-level systems.

Why MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe is better

efficiency

MONTECH Century II has 80 Plus Gold certification compared to GameMax's Bronze.

build quality

Century II features Cybenetics Platinum certification and fully modular design.

warranty

Century II offers a 10-year warranty, while Rampage does not specify a warranty period.

Why GameMax 800W Rampage Power Supply is better

price

GameMax Rampage is significantly cheaper at £45.94.

cooling

Rampage has a highlighted ultra-silent 14cm cooling fan.

basic compatibility

Rampage offers a single 12V rail for high compatibility.

Overall score

MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe
85
GameMax 800W Rampage Power Supply
65

Specifications

SpecMONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & CybeGameMax 800W Rampage Power Supply
BrandMontechGAMEMAX
Power Output850W800W
Certification80 Plus Gold80 Plus Bronze
ModularFully ModularNon-Modular
CoolingNot specified14cm fan

Dimension comparison

MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & CybeGameMax 800W Rampage Power Supply

Pricing Comparison

The MONTECH Century II is priced at £80.04, while the GameMax 800W Rampage is considerably more affordable at £45.94. This pricing difference of £34.10 may significantly influence buyers, especially those on a budget. The Century II's higher price reflects its high-end features and certifications, which may appeal to gamers and enthusiasts looking for superior performance. In contrast, the Rampage offers a more budget-friendly option without compromising essential functionalities, making it suitable for basic systems and first-time builders.

Efficiency Ratings

When it comes to efficiency, the MONTECH Century II boasts an 80 Plus Gold certification, which indicates its capability to maintain high efficiency levels, particularly under load. This certification can mean efficiencies of up to 90% or more, ensuring lower electricity bills and better performance. On the other hand, the GameMax Rampage holds an 80 Plus Bronze certification, achieving an efficiency of up to 88% at 50% load. While both power supplies are efficient, the Century II's Gold rating gives it a slight edge, making it a better choice for those who prioritise energy efficiency and long-term cost savings.

Build Quality and Components

The MONTECH Century II is constructed with high-quality components and features Cybenetics Platinum certification, which further enhances its reputation for reliability. It is fully modular, allowing for easier cable management and improved airflow within the PC case. In comparison, the GameMax Rampage uses a Japanese TK main capacitor, which is known for its reliability and extended life expectancy. While the Rampage is built with decent components for its price, the Century II's fully modular design and premium certifications indicate a higher build quality, making it more suitable for high-performance gaming rigs.

Cooling Systems

Cooling is a crucial aspect of any power supply, and both the MONTECH Century II and GameMax Rampage incorporate features to ensure effective thermal management. The Rampage is equipped with a 14cm cooling fan designed to operate quietly while providing adequate cooling. This ensures the unit runs smoothly and lasts longer. In contrast, the Century II's specifications do not explicitly mention its cooling solution, but its high-end design suggests it is engineered for effective thermal dissipation. While both models focus on cooling, the Rampage's fan is explicitly highlighted as ultra-silent, which might appeal to users who prioritise noise levels in their systems.

Compatibility Features

The MONTECH Century II is designed to support the latest ATX 3.1 and PCIe 5.1 standards, making it a future-proof option for gamers and PC builders looking to utilise the latest hardware. It also includes a 12V-2x6 cable, which enhances compatibility with high-demand components. Conversely, the GameMax Rampage offers a single 12V rail, which ensures high compatibility with various components. While both power supplies provide adequate compatibility, the Century II's advanced standards make it a better choice for those looking to build or upgrade to the latest technology.

Warranty and Support

In terms of warranty, the MONTECH Century II comes with an impressive 10-year warranty, indicating the manufacturer's confidence in its durability and performance. This extended warranty can provide peace of mind for users investing in a high-end power supply. On the other hand, the GameMax Rampage does not specify a warranty period, which could be a drawback for potential buyers seeking assurance. A longer warranty often correlates with better support and reliability, making the Century II more appealing for those who value long-term investment.

User Target Audience

The MONTECH Century II targets serious gamers and PC enthusiasts who demand high performance and reliability from their power supplies. Its premium features, certifications, and extended warranty make it ideal for high-end builds. In contrast, the GameMax 800W Rampage is designed for budget-conscious users, entry-level gamers, or those looking to upgrade basic systems. Its affordability and decent performance specifications make it suitable for users who may not require the highest efficiency or advanced features, positioning it as an excellent choice for first-time builders.

Which should you buy?

In conclusion, the choice between the MONTECH Century II and the GameMax 800W Rampage largely depends on your specific needs and budget. If you are looking for a high-efficiency power supply with advanced compatibility, build quality, and a long warranty, the MONTECH Century II is the clear winner. However, if you are on a tighter budget and require a reliable power supply for basic gaming or general computing, the GameMax Rampage offers a solid and cost-effective alternative. Ultimately, both units cater to different segments of the market, making your choice dependent on your priorities as a builder or gamer.

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MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe vs GameMax 800W Rampage Power Supply | versusfinder