SAMA B850 850W ATX Power Supply vs Mean Well EDR-120-24 Single Output DIN Rail Power Supply 24V 5 Amp 120W
Updated August 2026 — The SAMA B850 is the superior choice for high-performance needs, while the Mean Well EDR-120-24 is suitable for budget-friendly, low-power applications.
The SAMA B850 is the superior choice for high-performance needs, while the Mean Well EDR-120-24 is suitable for budget-friendly, low-power applications.
Why SAMA B850 850W ATX Power Supply is better
Power Output
850W vs 120W capacity
Efficiency
80 PLUS Bronze certified
Compatibility
Supports modern GPUs and motherboards
Why Mean Well EDR-120-24 Single Output DIN Rail Power Supply 24V 5 Amp 120W is better
Price
More budget-friendly at C$42.99
Simplicity
Designed for straightforward industrial applications
Size
Compact DIN rail design
Overall score
Specifications
| Spec | SAMA B850 850W ATX Power Supply | Mean Well EDR-120-24 Single Output DIN Rail Power Supply 24V 5 Amp 120W |
|---|---|---|
| Brand | SAMA | MEAN WELL |
| Output Voltage | N/A | 24V |
| Output Current | N/A | 5A |
| Cooling Fan | Yes | No Info |
| Protection Features | OVP, OCP, OPP, SCP | None |
Dimension comparison
Introduction to Power Supplies
When selecting a power supply, understanding the specific needs of your system is crucial. In this comparison, we’ll look at the SAMA B850 850W ATX Power Supply and the Mean Well EDR-120-24 Single Output DIN Rail Power Supply. While the SAMA B850 is designed for high-performance gaming rigs, the Mean Well EDR-120-24 caters to industrial applications. Each power supply serves a different market segment, with distinct specifications and price points.
Power Output and Capacity
The SAMA B850 has an impressive power capacity of 850W, making it suitable for high-end systems that may include demanding components such as the latest GPUs. In contrast, the Mean Well EDR-120-24 offers a maximum output power of 120W, which is sufficient for lower-power applications but may not support high-performance hardware. This significant difference in power output—850W versus 120W—highlights the SAMA B850 as a better choice for gamers and professionals requiring robust performance.
Efficiency Ratings
Efficiency is a key factor when choosing a power supply, affecting both performance and electricity costs. The SAMA B850 boasts an 80 PLUS Bronze certification, indicating over 85% efficiency at typical loads. This high efficiency not only helps in reducing electricity bills but also minimizes heat output, which can enhance the longevity of your components. The Mean Well EDR-120-24 does not specify an efficiency rating in the provided data, suggesting that it may not be as efficient as the SAMA B850, especially considering the latter’s certification.
Compatibility with Modern Components
When it comes to compatibility, the SAMA B850 is ATX 3.1 and PCIe 5.1 ready, supporting the latest motherboards and high-end GPUs, including those from the RTX 4090 and 50 series. This makes it an ideal choice for gamers who want future-proofing in their builds. On the other hand, the Mean Well EDR-120-24 is specifically designed for industrial applications with a fixed output of 24V, which may limit its use in consumer-grade systems. The compatibility with high-performance components is a strong advantage for the SAMA B850.
Design and Aesthetics
The design of a power supply can impact both functionality and the overall look of a PC build. The SAMA B850 features sleek black flat cables that not only improve cable management but also enhance case airflow and aesthetics. This design is particularly appealing to gamers and PC builders who prioritise a clean and professional appearance. Conversely, the Mean Well EDR-120-24 is designed for DIN rail mounting, which is practical for industrial settings but may not cater to the visual preferences of consumer PC builders.
Cooling Solutions
Effective cooling solutions are essential for maintaining optimal performance and longevity of power supplies. The SAMA B850 includes a temperature-controlled fan designed to operate quietly while ensuring adequate cooling. This feature is particularly valuable in gaming setups where noise levels can be a concern. The Mean Well EDR-120-24 does not provide specific details about its cooling system, which may lead to concerns about its ability to manage heat effectively during prolonged usage in demanding environments.
Warranty and Reliability
A manufacturer’s warranty can provide peace of mind regarding product reliability. The SAMA B850 comes with a 3-year warranty and includes multiple protections such as Over Voltage Protection (OVP), Over Current Protection (OCP), Over Power Protection (OPP), and Short Circuit Protection (SCP). This level of assurance is beneficial for users investing in high-end components. In contrast, no warranty information is provided for the Mean Well EDR-120-24, which may deter potential buyers looking for a reliable power supply solution.
Price Comparison
Pricing can play a significant role in decision-making when it comes to power supplies. The SAMA B850 is priced at C$74.99, reflecting its high-performance capabilities and features tailored for gaming and professional use. On the other hand, the Mean Well EDR-120-24 is more budget-friendly at C$42.99, making it an attractive option for those with lower power requirements. However, the price difference is justified by the performance and efficiency benefits offered by the SAMA B850.
Which should you buy?
In conclusion, your choice between the SAMA B850 850W ATX Power Supply and the Mean Well EDR-120-24 should be guided by your specific needs. If you are a gamer or a professional seeking a high-capacity, efficient power supply with modern compatibility and robust cooling, the SAMA B850 is the clear winner. However, if you require a straightforward solution for low-power applications at a more affordable price, the Mean Well EDR-120-24 is a viable option. Ultimately, understanding your requirements will lead you to the best power supply for your setup.
versusfinder.com is a participant in the Amazon.ca Associates Program. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

