SUPERNIGHT 12V 30A Switching Power Supply, 110-240 vs Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 &
Updated August 2026 — Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 & leads on warranty and cooling.
The Thermaltake Smart BM3 offers superior power capacity and features, making it ideal for high-performance systems, while the SUPERNIGHT is a budget-friendly option for basic applications.
Why SUPERNIGHT 12V 30A Switching Power Supply, 110-240 is better
Price
SUPERNIGHT is significantly cheaper at $20.99.
Simplicity
SUPERNIGHT is easier to use for basic applications.
Return Policy
SUPERNIGHT offers a 30-day worry-free return.
Why Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 & is better
Power Capacity
Thermaltake provides 750W compared to SUPERNIGHT's 360W.
Efficiency
Thermaltake is 80Plus Bronze certified.
Warranty
Thermaltake has a 5-year warranty compared to 1 year for SUPERNIGHT.
Overall score
Specifications
| Spec | SUPERNIGHT 12V 30A Switching Power Supply, 110-240 | Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 & |
|---|---|---|
| Brand | SUPERNIGHT | Thermaltake |
| Voltage | 12V | 100-240V |
| Current | 30A | N/A |
| Cooling Fan | N/A | 120mm FDB |
| Protection | Yes | Yes |
Dimension comparison
Overview
When it comes to power supplies, the SUPERNIGHT 12V 30A Switching Power Supply and the Thermaltake Smart BM3 750W are two distinct options that cater to different needs. The SUPERNIGHT is priced at $20.99, making it a budget-friendly option, while the Thermaltake is available for $75.99, reflecting its higher capacity and advanced features. Understanding what each model offers is crucial for making an informed decision.
Power Capacity
The Thermaltake Smart BM3 boasts a substantial power output of 750W, making it suitable for high-performance systems, especially those using modern graphics cards. In contrast, the SUPERNIGHT delivers 360W, which is adequate for smaller applications like 3D printers, LED strips, and basic electronics. If you plan to run a powerful gaming rig or workstation, the Thermaltake's capacity is about 108% more than that of the SUPERNIGHT, which could be a deciding factor for users needing more robust performance.
Design and Build Quality
Both power supplies are designed with durability in mind, but they differ significantly in their construction. The Thermaltake features a high-quality Japanese 105°C capacitor, ensuring longevity under heavy use. On the other hand, the SUPERNIGHT emphasizes stability and includes protection features like overcharge and short-circuit safeguards. While the Thermaltake may be more resilient for high-demand applications, the SUPERNIGHT is tailored for specific, less intensive uses, making it a solid choice for DIY projects.
Efficiency Ratings
Efficiency is a critical aspect to consider when selecting a power supply. The Thermaltake Smart BM3 is 80Plus Bronze certified, which means it meets certain efficiency standards to reduce energy consumption and heat output. This certification makes it a more environmentally friendly option, especially for users who run their systems continuously. The SUPERNIGHT does not specify an efficiency rating, which could imply that it may not be as efficient in energy usage when compared to the Thermaltake.
Modularity Features
The Thermaltake Smart BM3 is a semi-modular power supply, allowing users to connect only the cables they need. This feature not only minimizes clutter inside the case but also improves airflow, contributing to better cooling. The SUPERNIGHT, however, does not offer modularity, which could result in excess cables that may complicate system builds. For users who prioritize a tidy setup or have specific cable management needs, the Thermaltake's modularity is a significant advantage.
Compatibility
Compatibility with modern hardware is vital, especially as technology advances. The Thermaltake Smart BM3 is designed to meet ATX 3.1 standards and is PCIe Gen 5 compliant, making it suitable for the latest graphics cards and components. The SUPERNIGHT is more versatile in terms of applications, supporting devices like 3D printers and LED strips. However, for gamers and PC builders focusing on the latest technologies, the Thermaltake’s compatibility is superior.
Cooling Mechanism
Cooling is essential for maintaining optimal performance in power supplies. The Thermaltake Smart BM3 features a 120mm fluid dynamic bearing fan with a Smart Zero Fan function, which only activates the fan when the load exceeds 20%. This design minimizes noise during light use. In contrast, the SUPERNIGHT does not specify details about its cooling mechanism, which leaves uncertainty regarding its ability to manage heat effectively. Users prioritizing quiet operation and efficient cooling will likely prefer the Thermaltake.
Warranty and Customer Support
The Thermaltake Smart BM3 comes with a five-year warranty, which provides peace of mind for users investing in a more expensive unit. This extended warranty suggests confidence in the product's durability and performance. The SUPERNIGHT offers a 30-day worry-free return policy and one year of replacement assurance, alongside lifetime customer service support. While both products provide customer support, the length of warranty on the Thermaltake could sway users towards it, especially for long-term investments.
Which should you buy?
Choosing between the SUPERNIGHT 12V 30A Switching Power Supply and the Thermaltake Smart BM3 750W ultimately depends on your specific needs. If you require a cost-effective solution for less intensive applications, the SUPERNIGHT’s price of $20.99 makes it an attractive option. However, for high-performance systems and cutting-edge technology, the Thermaltake at $75.99 offers superior capacity, efficiency, and features that justify the price difference. Ultimately, those needing robust power for modern setups would benefit more from the Thermaltake, while hobbyists and small project users might find the SUPERNIGHT sufficient for their needs.

