CORSAIR RM750e ATX 3.1 PCIe 5.1 Ready Fully Modular 750W Power Supply – 12V-2x6 Cable Included, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black vs MONTECH Century II - 850W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybenetics Platinum - Fully Modular - ATX 3.1 & PCIe 5.1 Ready with 12V-2x6 Cable - 10 Years Warranty

Price Comparison

The Montech Century II is about 0.1% cheaper than the Corsair RM750e, priced at $89.90 versus $89.99. While the difference is minimal—just nine cents—the Montech offers a higher wattage and longer warranty for nearly identical pricing. The Corsair RM750e averages $95.59 over the past 90 days, indicating it has been more expensive historically, while the Montech has averaged $88.00, suggesting better long-term value. For budget-conscious buyers seeking premium features without paying a premium price, the Montech presents a slightly more economical option.

Wattage and Power Delivery

The Montech Century II delivers 850W of power, significantly exceeding the Corsair RM750e’s 750W capacity. This extra 100W provides greater headroom for high-end gaming systems or future upgrades, particularly those with power-hungry GPUs or multiple drives. Both units are designed for modern builds with ATX 3.1 and PCIe 5.1 readiness, but only the Montech explicitly includes a 12V-2x6 cable in its configuration. The Corsair RM750e also includes this cable, ensuring compatibility with next-gen GPUs, but the Montech’s higher wattage makes it better suited for systems pushing beyond 750W under load.

Efficiency Certification

Both power supplies boast dual efficiency certifications: 80 Plus Gold and Cybenetics Platinum. The Montech Century II is labeled as such, offering the same level of energy efficiency as the Corsair RM750e, which is rated Cybenetics Gold. Despite the similar performance claims, the Montech’s inclusion of both certifications suggests a potentially more rigorous testing standard. However, neither product specifies exact efficiency percentages, so real-world performance differences remain unverifiable from available data. Still, both meet stringent standards for low energy waste and stable output.

Modularity and Cable Management

Both the Corsair RM750e and Montech Century II are fully modular, meaning users can connect only the cables needed for their build. This reduces clutter inside the case and improves airflow. The Corsair RM750e includes six SATA connectors and two PATA connectors, along with a full complement of 24-pin, 8-pin EPS, and PCIe connectors. The Montech Century II does not list specific connector counts, but its fully modular design implies similar flexibility. The absence of detailed cable specifications for the Montech limits direct comparison, though both designs prioritize clean internal routing and ease of installation.

Cooling and Noise Performance

The Corsair RM750e features a 120mm rifle bearing fan with a specially calculated fan curve to minimize noise even under full load. This design prioritizes quiet operation during intensive tasks. The Montech Century II does not provide any details on fan size, bearing type, or thermal management strategy. Without information on cooling mechanisms, it’s impossible to assess noise levels or thermal performance. Based solely on available data, the Corsair RM750e offers a clear advantage in noise control and fan reliability due to its documented fan technology.

Build Quality and Component Ratings

The Corsair RM750e uses 105°C-rated capacitors, which enhance electrical stability and longevity under stress. These industrial-grade components support reliable power delivery across varying loads. The Montech Century II does not mention capacitor ratings or other internal component specs. While both are marketed as high-end units, only the Corsair provides verifiable details about its internal quality. The Corsair’s use of 105°C-rated capacitors indicates a focus on durability and consistent performance, especially important in high-load scenarios.

Warranty and Longevity

The Corsair RM750e comes with a seven-year warranty, a standard for many high-performance PSUs. The Montech Century II offers a ten-year warranty, which is notably longer and signals stronger confidence in product reliability. This extended coverage could be a deciding factor for users planning long-term system investments. While both warranties cover defects, the Montech’s three-year advantage may offer peace of mind for users who prioritize long-term support and manufacturer trustworthiness.

Which should you buy?

Choose the Montech Century II if you need higher wattage (850W vs. 750W), a longer ten-year warranty, and want to pay just $89.90—about 0.1% less than the Corsair RM750e. Its dual 80 Plus Gold and Cybenetics Platinum certification matches the Corsair’s efficiency claims, and it includes a 12V-2x6 cable. However, if noise performance and verified component quality matter most, the Corsair RM750e is the better choice: it features a 120mm rifle bearing fan for quieter operation and 105°C-rated capacitors for superior electrical stability. Ultimately, the Montech wins on price and warranty length, but the Corsair leads in proven cooling and build quality.