MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe vs GameMax 750W Rampage Power Supply
Updated August 2026 — The MONTECH Century II offers superior efficiency and power output, making it the better choice for high-performance builds. However, the GameMax Rampage is a solid budget option.
The MONTECH Century II offers superior efficiency and power output, making it the better choice for high-performance builds. However, the GameMax Rampage is a solid budget option.
Why MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe is better
efficiency rating
MONTECH Century II has 80 Plus Gold certification compared to GameMax Rampage's Bronze.
power output
MONTECH Century II provides 850W versus GameMax Rampage's 750W.
modular design
MONTECH Century II features a fully modular design, while GameMax Rampage is semi-modular.
Why GameMax 750W Rampage Power Supply is better
price
GameMax Rampage is £45.80, significantly cheaper than MONTECH Century II at £80.04.
cooling fan
GameMax Rampage includes a 14cm cooling fan for quiet operation.
build quality
GameMax Rampage uses high-quality Japanese TK main capacitors.
Overall score
Specifications
| Spec | MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybe | GameMax 750W Rampage Power Supply |
|---|---|---|
| Brand | Montech | GAMEMAX |
| Certification | 80 Plus Gold | 80 Plus Bronze |
| Modular Type | Fully Modular | Semi-Modular |
| Cooling Fan | Not specified | 14cm |
| Capacitor | Standard | Japanese TK |
Dimension comparison
Price Comparison
The MONTECH Century II is priced at £80.04, while the GameMax 750W Rampage is more budget-friendly at £45.80. This significant difference of £34.24 may influence potential buyers depending on their budget constraints. While the MONTECH Century II offers premium features, the GameMax Rampage provides a more economical option, making it appealing for those who seek a reliable power supply without breaking the bank. The choice between these two products will largely depend on whether users are willing to invest in higher quality components or if they prefer to save money on their power supply.
Efficiency Ratings
The MONTECH Century II boasts an impressive 80 Plus Gold certification, indicating a high level of energy efficiency, while the GameMax Rampage has an 80 Plus Bronze certification. The Gold certification signifies that the Century II can achieve an efficiency of up to 92% at a 50% load, whereas the Bronze-rated Rampage achieves about 88% efficiency. This difference in efficiency can lead to reduced energy costs over time and a cooler system, making the MONTECH Century II a more attractive option for gamers and PC builders seeking to optimise their systems.
Power Output
With a power output of 850W, the MONTECH Century II significantly surpasses the GameMax Rampage's 750W capacity. This additional power allows the Century II to support more demanding hardware configurations and ensures that users can run multiple high-performance components without risk of power shortages. The higher wattage of the MONTECH Century II makes it ideal for serious gamers and those looking to future-proof their builds, while the GameMax Rampage is suitable for standard gaming rigs and basic systems.
Modular Design
The MONTECH Century II features a fully modular cable management system, which allows users to connect only the cables they need, leading to improved airflow and a cleaner build. In contrast, the GameMax Rampage utilises a semi-modular design, which, while more organised than non-modular options, still requires some cables to be permanently attached. The fully modular design of the Century II provides a distinct advantage for users who prioritise aesthetics and airflow in their builds.
Cooling Solutions
The GameMax Rampage is equipped with a 14cm cooling fan designed to maintain optimal temperatures while operating quietly. This feature ensures that the power supply can run efficiently without excessive noise, which is beneficial for users who prefer a silent gaming environment. The MONTECH Century II does not specify its cooling solution in the available data, making it difficult to directly compare cooling performance. However, the known efficiency and build quality of the Century II suggest it may also provide effective cooling, though users may want to research this aspect further.
Build Quality and Components
The MONTECH Century II is backed by a robust 10-year warranty, reflecting the manufacturer’s confidence in its reliability and long-term performance. This extended warranty period is indicative of high-quality components and construction. On the other hand, the GameMax Rampage incorporates a Japanese TK main capacitor, which is known for enhancing the reliability and lifespan of power supplies. While both products are built with quality in mind, the longer warranty of the MONTECH Century II may appeal more to consumers looking for durability and assurance in their purchase.
Compatibility and Future-Proofing
The MONTECH Century II is designed to be ATX 3.1 and PCIe 5.1 ready, ensuring compatibility with the latest hardware standards. This forward-thinking design makes it an excellent choice for gamers and PC builders who want to stay current with technological advancements. The GameMax Rampage, while providing solid performance, does not specify similar compatibility features, which may limit its appeal for those looking to incorporate the latest components into their builds. Users aiming for future-proofing will likely find the MONTECH Century II more appealing due to its modern specifications.
Which should you buy?
Choosing between the MONTECH Century II and the GameMax 750W Rampage boils down to specific needs and budget. If you are looking for a high-efficiency, powerful, and future-proof option with a fully modular design, the MONTECH Century II is the superior choice, albeit at a higher price of £80.04. Conversely, if you are on a tighter budget and require a reliable power supply for a basic or mid-range system, the GameMax Rampage at £45.80 offers solid performance with decent features, making it a sensible option. Ultimately, the decision hinges on whether you prioritise performance and efficiency or cost-effectiveness in your power supply purchase.
versusfinder.com is a participant in the Amazon Services LLC Associates Programme and the Amazon EU Associates Programme. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

