CORSAIR RM850x Fully Modular Low-Noise ATX Power vs Segotep 650W 80 Plus Gold Certified Non-Modular
Updated August 2026 — CORSAIR RM850x Fully Modular Low-Noise ATX Power leads on modularity and warranty.
The CORSAIR RM850x outperforms the Segotep 650W in efficiency, power output, and modularity, making it the better choice for high-performance builds.
Why CORSAIR RM850x Fully Modular Low-Noise ATX Power is better
Efficiency
CORSAIR RM850x has a Cybenetics Gold certification with up to 91% efficiency.
Modularity
CORSAIR RM850x features a fully modular design for better cable management.
Power Output
CORSAIR RM850x provides 850 watts compared to Segotep's 650 watts.
Why Segotep 650W 80 Plus Gold Certified Non-Modular is better
Price
Segotep 650W is significantly cheaper at $49.99.
Simplicity
Non-modular design of Segotep 650W can simplify installation.
Global Use
Segotep 650W offers global voltage adaptation.
Overall score
Specifications
| Spec | CORSAIR RM850x Fully Modular Low-Noise ATX Power | Segotep 650W 80 Plus Gold Certified Non-Modular |
|---|---|---|
| Modularity | Fully Modular | Non-Modular |
| Efficiency Rating | Cybenetics Gold | 80 Plus Gold |
| PCIe Support | PCIe 5.1 | 6+2 Pin |
| Cooling Fan | 140mm | 120mm |
| Connector Type | 12V-2x6 | 6+2 Pin |
Dimension comparison
Overview of the Products
When considering power supplies, two options stand out: the CORSAIR RM850x and the Segotep 650W. The CORSAIR RM850x is priced at $161.93, while the Segotep 650W is significantly cheaper at $49.99, making it about 69% less expensive. However, price alone does not determine the best choice for your needs. Each product has distinct features appealing to different users, from efficiency ratings to design types.
Design and Modularity
The CORSAIR RM850x features a fully modular design, allowing users to connect only the cables they need for a clean and efficient build. This results in better airflow within the case and less clutter. In contrast, the Segotep 650W has a non-modular design, which means all cables are permanently attached. While this can simplify setup, it may lead to a messier appearance inside the PC case. Users who prioritize aesthetics and airflow may prefer the modular design of the CORSAIR RM850x.
Efficiency Ratings
The CORSAIR RM850x is Cybenetics Gold Certified, boasting an efficiency rating of up to 91%. This high efficiency translates to lower power consumption, reduced noise, and cooler operation. On the other hand, the Segotep 650W has an 80 Plus Gold certification, ensuring solid efficiency but slightly lower than that of the CORSAIR model. If energy efficiency and operational noise are your top priorities, the CORSAIR RM850x is the superior choice.
Power Output and Performance
The CORSAIR RM850x delivers 850 watts of power, accommodating high-performance components and demanding gaming setups. Conversely, the Segotep 650W offers 650 watts, which is adequate for mid-range builds but may limit users looking to run high-end graphics cards or multiple components. For users planning to build a powerful gaming rig or workstation, the additional power of the CORSAIR RM850x could be crucial.
Cooling and Noise Levels
One of the standout features of the CORSAIR RM850x is its 140mm fan designed for low noise operation. This is particularly beneficial for users who prioritize a quiet gaming or working environment. The Segotep 650W also includes a 120mm silent fan, but its non-modular design may lead to increased heat buildup and noise due to cable clutter. If noise levels are a significant concern, the design of the CORSAIR RM850x may offer a better experience.
Compatibility and Connectivity
The CORSAIR RM850x is ATX 3.1 compliant and supports PCIe 5.1, making it compatible with the latest hardware, including next-generation graphics cards without the need for adapters. The Segotep 650W features four PCI-E 6+2 pin connectors, which are sufficient for many builds but may not support the latest standards. For future-proofing and compatibility with cutting-edge components, the CORSAIR RM850x is the more versatile option.
Warranty and Longevity
Investing in the CORSAIR RM850x comes with a ten-year warranty, demonstrating the brand's confidence in its durability and reliability. The Segotep 650W does not specify warranty information but typically offers shorter warranties in its class. A longer warranty can provide peace of mind and assurance of quality, making the CORSAIR model a more reliable long-term investment.
Which should you buy?
Choosing between the CORSAIR RM850x and the Segotep 650W ultimately depends on your specific needs and budget. If you require a powerful, efficient, and modular power supply for demanding setups, the CORSAIR RM850x is the clear winner at $161.93. However, if you're building a more budget-conscious system and need a straightforward, adequate power supply, the Segotep 650W at $49.99 offers good value, albeit with limitations in power output and efficiency. Consider your priorities—whether they lean more towards performance or affordability—before making a decision.

