SAMA B850 850W ATX Power Supply vs Official Raspberry Pi 5 27W USB-C Power Supply
Updated August 2026 — The SAMA B850 is ideal for high-performance systems, while the Official Raspberry Pi 5 power supply is perfect for low-power applications. Choose based on your specific needs.
The SAMA B850 is ideal for high-performance systems, while the Official Raspberry Pi 5 power supply is perfect for low-power applications. Choose based on your specific needs.
Why SAMA B850 850W ATX Power Supply is better
Power Output
850W output vs 27W output
Efficiency
80 PLUS Bronze Certified vs no certification
Warranty
3-year warranty vs no warranty mentioned
Why Official Raspberry Pi 5 27W USB-C Power Supply is better
Price
C$31.90 vs C$74.99
Compact Design
Smaller form factor for Raspberry Pi
Simplicity
Designed specifically for Raspberry Pi 5
Overall score
Specifications
| Spec | SAMA B850 850W ATX Power Supply | Official Raspberry Pi 5 27W USB-C Power Supply |
|---|---|---|
| Brand | SAMA | Raspberry Pi |
| Type | ATX Power Supply | USB-C Power Supply |
| Cooling | Temperature-controlled fan | No moving parts |
| Compatibility | ATX 3.1, PCIe 5.1 | Raspberry Pi 5 |
| Output Voltage | N/A | 5.1V, 9V, 12V, 15V |
Dimension comparison
Product Overview
The SAMA B850 850W ATX Power Supply and the Official Raspberry Pi 5 27W USB-C Power Supply cater to different user needs and device requirements. The SAMA B850, priced at C$74.99, is ideal for high-performance PCs, while the Raspberry Pi 5 power supply, at C$31.90, is tailored specifically for the Raspberry Pi 5. Understanding their unique features will help you choose the right power supply for your setup.
Power Output and Efficiency
The SAMA B850 boasts an impressive 850W output, making it suitable for high-end components such as the latest GPUs, including the RTX 4090/50 Series. It is also 80 PLUS Bronze Certified, achieving over 85% efficiency at typical loads, which contributes to lower electricity costs over time. In contrast, the Official Raspberry Pi 5 power supply provides a maximum output of 27W, specifically designed to meet the needs of the Raspberry Pi 5 with multiple voltage profiles. While the SAMA B850 is optimal for more demanding systems, the Raspberry Pi power supply is engineered for stable performance in lower-power applications.
Design and Aesthetics
The design of the SAMA B850 includes sleek black flat cables that not only enhance the aesthetics of a build but also improve airflow within the case. This attention to detail appeals to users who prioritize a clean and efficient setup. On the other hand, the Official Raspberry Pi 5 power supply features a compact and functional design with a 1.2m 17AWG USB Type-C cable. While the SAMA’s aesthetic appeal is more tailored to gaming or high-performance systems, the Raspberry Pi's design focuses on practicality and ease of use in smaller, less demanding environments.
Cooling and Noise Levels
Cooling performance is a critical factor for power supplies, especially in high-performance builds. The SAMA B850 incorporates a temperature-controlled fan that guarantees quiet operation while effectively maintaining optimal cooling. This feature is particularly advantageous for gaming setups or media centers where noise levels can be a concern. In contrast, the Raspberry Pi power supply operates silently due to its lack of moving parts, as it is designed for low-power applications. Thus, while both products are quiet, the SAMA B850 is specifically built for environments that may generate more heat.
Warranty and Protection Features
The SAMA B850 comes with a comprehensive 3-year warranty, along with multiple protection features, including OVP (Over Voltage Protection), OCP (Over Current Protection), OPP (Over Power Protection), and SCP (Short Circuit Protection). This level of assurance is crucial for high-end users who require reliability and safety for their expensive components. Conversely, the Official Raspberry Pi 5 power supply does not mention a warranty or additional protection features in the available data, which may be a consideration for users concerned about longevity and safety in their devices.
Compatibility
The SAMA B850 is ATX 3.1 and PCIe 5.1 ready, making it compatible with the latest motherboards and graphics cards. This versatility allows users to future-proof their builds. The power supply supports demanding applications, which is a significant advantage for gamers and high-performance PC builders. In contrast, the Official Raspberry Pi 5 power supply is specifically designed for the Raspberry Pi 5, providing tailored voltage outputs (5.1V, 5A; 9V, 3A; 12V, 2.25A; 15V, 1.8A). This specificity ensures that it delivers optimal power for the Raspberry Pi’s requirements, but it limits its use to that platform.
Price Comparison
The price difference between the SAMA B850 and the Official Raspberry Pi 5 power supply is substantial. The SAMA B850 is priced at C$74.99, reflecting its high output and robust features suitable for gaming rigs and power-hungry devices. In contrast, the Raspberry Pi power supply is available for C$31.90, making it an economical choice for users looking to power low-demand devices. This clear price distinction indicates the different target markets for these products, with the SAMA B850 aimed at enthusiasts and the Raspberry Pi supply catering to casual users or hobbyists.
Which should you buy?
Choosing between the SAMA B850 850W ATX Power Supply and the Official Raspberry Pi 5 27W USB-C Power Supply ultimately depends on your specific needs. If you are building a high-performance gaming or workstation PC that requires significant power, the SAMA B850 is the clear choice with its 850W output and efficient cooling features. However, if your requirements are modest, such as powering a Raspberry Pi 5 for basic tasks, the Official Raspberry Pi 5 power supply offers excellent value at a much lower price. Assess your power needs and budget to determine which power supply will best serve your setup.
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