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Arcity 5V 12V 24V Output Switching Power Supply vs Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 &

Updated August 2026 — Arcity 5V 12V 24V Output Switching Power Supply wins on size, Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 & wins on warranty and efficiency.

The Arcity is a budget-friendly option for low-power applications, while the Thermaltake excels in high-performance scenarios.

Why Arcity 5V 12V 24V Output Switching Power Supply is better

Price

Arcity is significantly cheaper at $21.98.

Size

Arcity is more compact, making it suitable for tight spaces.

Versatility

Arcity supports multiple voltage outputs for various devices.

Why Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 & is better

Power Output

Thermaltake provides 750W, suitable for high-performance systems.

Efficiency

Thermaltake is 80Plus Bronze certified for better energy efficiency.

Warranty

Thermaltake offers a 5-year warranty for added reliability.

Overall score

Arcity 5V 12V 24V Output Switching Power Supply
65
Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 &
85

Specifications

SpecArcity 5V 12V 24V Output Switching Power SupplyThermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 &
Output Voltage5V/12V/24V750W
EfficiencyN/A80Plus Bronze
ProtectionOVP, OCP, SCPIndustrial Grade
Cooling SystemHeat DissipationFDB Fan
WarrantyN/A5 Years

Dimension comparison

Arcity 5V 12V 24V Output Switching Power SupplyThermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 &

Overview of the Arcity and Thermaltake Power Supplies

When comparing the Arcity 5V 12V 24V Output Switching Power Supply Unit and the Thermaltake Smart BM3 750W 80Plus Bronze Power Supply, there are distinct differences in price, specifications, and intended use. The Arcity is priced at $21.98, making it about 17% cheaper than the Thermaltake, which retails for $75.99. This significant price disparity reflects the distinct purposes these power supplies serve, with the Arcity designed for low-power applications and the Thermaltake catering to high-performance systems.

Design and Build Quality

The design and build quality of both power supplies cater to different user needs. The Arcity features a compact design, measuring 160mm x 98mm x 39mm, which makes it ideal for installations where space is limited. Its lightweight construction (350g) and excellent heat dissipation capabilities ensure reliability in various applications, including LED strips and CCTV cameras. On the other hand, the Thermaltake, with dimensions of 150mm x 86mm x 140mm, is slightly more robust, reflecting its capacity to support more demanding hardware, such as modern graphics cards. The use of high-quality Japanese capacitors in the Thermaltake enhances its durability and overall performance, which could be a critical factor for gaming enthusiasts.

Power Output and Efficiency

In terms of power output, the Arcity provides a versatile range with outputs of 5V/8A, 12V/8A, and 24V/3A. This flexibility makes it suitable for a variety of devices, from arcade machines to audio amplifiers. The Thermaltake, however, stands out with its impressive 750W capacity and 80Plus Bronze certification, indicating higher energy efficiency at standard loads. This efficiency means less wasted energy and lower electricity bills over time, which can be significant for users with high-performance systems. The difference in power output clearly illustrates the intended usage scenarios for each product, with the Arcity aimed at lower-power applications and the Thermaltake designed for high-demand environments.

Protection Features

Protection features are crucial for ensuring the longevity and reliability of power supplies. The Arcity boasts an array of protective features, including Overvoltage Protection (OVP), Overcurrent Protection (OCP), and Short-Circuit Protection (SCP), which help safeguard connected devices from unexpected surges or failures. Conversely, the Thermaltake includes built-in industrial-grade protections and a Smart Zero Fan function, which minimizes noise by keeping the fan off under low loads. This combination of protective features offers peace of mind for users of both products, though the Thermaltake's industrial-grade protections may appeal more to those using high-performance components.

Cooling Systems

Effective cooling is vital for maintaining optimal performance in power supplies. The Arcity's design promotes excellent heat dissipation, which is crucial for its applications in electronics and DIY projects. However, the Thermaltake incorporates a 120mm fluid dynamic bearing fan that not only provides efficient airflow but also features the Smart Zero Fan function. This function ensures the fan operates only when necessary, drastically reducing noise levels during low loads. For users who prioritize a quiet computing environment, the Thermaltake offers a more advanced cooling solution.

Intended Use and Versatility

The intended use of each power supply significantly influences their design and features. The Arcity is particularly versatile, making it suitable for various low-power applications, such as DIY electronics projects, arcade machines, and lighting systems. Its ability to deliver multiple voltage outputs allows users to adapt it for different devices. In contrast, the Thermaltake is tailored for high-performance gaming rigs and workstations, supporting the latest hardware standards, including PCIe Gen 5. This specialization makes it less versatile than the Arcity but far more powerful for demanding applications.

Warranty and Support

Warranty and support can be essential factors when making a purchase decision. The Arcity does not specify a warranty period, which could be a concern for potential buyers seeking assurance regarding product longevity. In contrast, the Thermaltake offers a solid 5-year warranty, reflecting the manufacturer's confidence in its product's durability and performance. This difference in warranty support may influence buyers who value long-term reliability and manufacturer backing.

Which should you buy?

Deciding between the Arcity 5V 12V 24V Output Switching Power Supply Unit and the Thermaltake Smart BM3 750W 80Plus Bronze Power Supply ultimately hinges on your specific needs. If you require a cost-effective solution for low-power applications, the Arcity at $21.98 is an excellent choice, offering versatility and essential protection features. However, if you're building a high-performance gaming rig and need a reliable power supply capable of handling demanding components, the Thermaltake, priced at $75.99, provides superior output, efficiency, and warranty support. Therefore, assess your requirements carefully to choose the power supply that best fits your needs.