Cooler Master V850 SFX Gold 850W Fully Modular vs CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX
Updated August 2026 — Cooler Master V850 SFX Gold 850W Fully Modular leads on modularity and warranty.
The Cooler Master V850 SFX Gold offers superior efficiency, modularity, and component quality compared to the Corsair CX550, making it the better choice for high-performance builds.
Why Cooler Master V850 SFX Gold 850W Fully Modular is better
Efficiency
80 Plus Gold vs Bronze certification
Modularity
Fully modular vs non-modular design
Warranty
10-year warranty vs 3-year warranty
Why CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX is better
Price
$65.99 vs $153.25
Cooling
Larger 120mm fan for quieter operation
Size
Standard ATX form factor fits more cases
Overall score
Specifications
| Spec | Cooler Master V850 SFX Gold 850W Fully Modular | CORSAIR CX550 80 Plus Bronze Non Modular Low-Noise ATX |
|---|---|---|
| Power Output | 850W | 550W |
| Efficiency Rating | 80 Plus Gold | 80 Plus Bronze |
| Cooling Fan | 92mm FDB | 120mm Thermally Controlled |
| Modular | Fully Modular | Non-Modular |
| Capacitors | 100% Japanese | Standard |
Dimension comparison
Overview of the Products
The Cooler Master V850 SFX Gold is a high-end power supply designed for small form factor builds, while the Corsair CX550 is a budget-friendly option suited for standard ATX setups. These two products represent different segments of the power supply market, catering to diverse user needs and preferences.
The Cooler Master V850 SFX Gold is priced at $153.25, whereas the Corsair CX550 is significantly more budget-friendly at $65.99, making it about 57% cheaper. This stark price difference highlights the varying features and capabilities each power supply offers, appealing to different types of consumers.
Design and Form Factor
The Cooler Master V850 SFX Gold boasts a compact SFX design ideal for mini-ITX cases, while the Corsair CX550 features a traditional ATX form factor suitable for most modern PC builds. The compactness of the V850 allows it to fit into tighter spaces, making it a perfect choice for users prioritizing a smaller case.
With a length of just 125mm, the Corsair CX550 is designed to easily fit into a wide variety of cases, making it versatile for standard builds. However, it does not offer the same level of space efficiency as the Cooler Master V850, which is specifically tailored for high-performance setups in smaller chassis.
Efficiency Ratings
Efficiency is a crucial aspect when considering a power supply. The Cooler Master V850 SFX Gold is rated at 80 Plus Gold certification, providing up to 90% efficiency. In contrast, the Corsair CX550 is 80 Plus Bronze certified, with an operational efficiency of up to 88%.
This difference in certification means that the V850 will generate less heat and reduce energy costs more effectively than the CX550. For users who are energy-conscious and looking for long-term savings, the Cooler Master model presents a more efficient solution despite its higher initial cost.
Cooling Solutions
Cooling performance is another critical factor in power supply selection. The Cooler Master V850 SFX Gold features a 92mm Fluid Dynamic Bearing (FDB) fan, designed for low maintenance and reliable cooling. This fan operates quietly while ensuring optimal thermal performance, which is essential for high-performance systems.
Conversely, the Corsair CX550 uses a 120mm thermally controlled fan that only ramps up under heavy load, allowing for quieter operation at lower power draws. While it provides adequate cooling, it may not match the advanced cooling capabilities of the V850, especially in intensive or prolonged usage scenarios.
Cable Management
The Cooler Master V850 SFX Gold is fully modular, allowing users to connect only the cables they need, which reduces clutter and improves airflow within the case. This feature is particularly beneficial for maintaining an organized setup, especially in compact builds where space is at a premium.
The Corsair CX550, on the other hand, is a non-modular power supply, meaning all cables are fixed, which can lead to unnecessary clutter and reduced airflow in the case. Users looking for a clean and efficient cable management system will find the Cooler Master V850's modular design to be a significant advantage.
Component Quality
Component quality plays a vital role in the longevity and performance of power supplies. The Cooler Master V850 SFX Gold is equipped with 100% Japanese capacitors, which enhance efficiency and minimize ripple noise. Such high-quality components contribute to overall reliability and performance, making it a robust choice for demanding systems.
In contrast, while the Corsair CX550 offers solid performance and reliability for everyday use, it does not emphasize the same level of premium components as the V850. Users seeking top-notch durability and performance might favor the quality of materials used in the Cooler Master model.
Warranty and Support
The Cooler Master V850 SFX Gold comes with an impressive 10-year warranty, reflecting the manufacturer's confidence in their product. This extended warranty period provides peace of mind for users investing in a higher-end power supply.
The Corsair CX550 offers a three-year warranty, which is standard for budget power supplies. While this warranty is respectable, it may not instil the same level of confidence as the longer warranty period of the Cooler Master. Users looking for long-term assurance might prefer the V850's superior warranty.
Which should you buy?
Choosing between the Cooler Master V850 SFX Gold and the Corsair CX550 ultimately depends on your specific needs and budget. If you're building a compact, high-performance system and prioritize efficiency, modularity, and quality, the Cooler Master V850 SFX Gold is the superior choice, albeit at a higher price of $153.25.
However, if you're looking for a more affordable option for a standard build and can compromise on modularity and efficiency, the Corsair CX550 at $65.99 is a solid choice. It offers reliable performance for everyday use without breaking the bank. Consider your specific requirements and budget to make the best decision for your setup.

