JUSTOP Black ATX 500W PSU vs Miuzei Raspberry Pi 4 Power Supply - 5V 4.1A 20.5W USB-C Charger with On/Off Swi
Updated August 2026 — The JUSTOP Black ATX 500W PSU is ideal for desktop PCs, while the Miuzei Raspberry Pi 4 Power Supply is perfect for Raspberry Pi projects. Choose based on your specific needs.
The JUSTOP Black ATX 500W PSU is ideal for desktop PCs, while the Miuzei Raspberry Pi 4 Power Supply is perfect for Raspberry Pi projects. Choose based on your specific needs.
Why JUSTOP Black ATX 500W PSU is better
higher power output
500W vs 20.5W
better safety certifications
UKCA, CE, FCC, UL, TUV certified
longer warranty
1 year warranty offered
Why Miuzei Raspberry Pi 4 Power Supply - 5V 4.1A 20.5W USB-C Charger with On/Off Swi is better
lower price
£10.99 vs £22.50
compact design
smaller and more portable
specific compatibility
designed for Raspberry Pi
Overall score
Specifications
| Spec | JUSTOP Black ATX 500W PSU | Miuzei Raspberry Pi 4 Power Supply - 5V 4.1A 20.5W USB-C Charger with On/Off Swi |
|---|---|---|
| Brand | JUSTOP | Miuzei |
| Current Price | £22.50 | £10.99 |
| Power Type | 500W | 20.5W |
| Cooling Fan | 120mm | none |
| Safety Certs | Yes | Limited |
Dimension comparison
Price Comparison
In terms of pricing, the Miuzei Raspberry Pi 4 Power Supply is significantly more affordable than the JUSTOP Black ATX 500W PSU. The Miuzei power supply is available for £10.99, while the JUSTOP PSU is priced at £22.50. This represents a difference of £11.51, with the Miuzei being almost half the price of the JUSTOP. For budget-conscious consumers or those only needing a power supply for a Raspberry Pi, the Miuzei offers an excellent entry point without sacrificing performance. Conversely, the JUSTOP PSU, while pricier, caters to users requiring a more robust power solution for desktop PCs.
Compatibility and Use Cases
Compatibility is a critical factor when selecting a power supply, and both products cater to different user needs. The Miuzei Raspberry Pi 4 Power Supply is designed specifically for the Raspberry Pi 4 Model B and is also compatible with earlier models like the Pi 3B+/3B and Orange Pi 5/5B/5 Plus. This targeted compatibility ensures that users can achieve optimal performance with their Raspberry Pi projects. In contrast, the JUSTOP Black ATX 500W PSU is suitable for desktop PCs, particularly those that do not require a PCIe connector. This makes it ideal for home or office desktops looking for a reliable power source, but it lacks the specific adaptability for smaller computing devices.
Power Output and Performance
When it comes to power output, the JUSTOP Black ATX 500W PSU boasts a significant maximum power of 500W, making it suitable for powering multiple components in a desktop PC. In comparison, the Miuzei Raspberry Pi 4 Power Supply delivers 5V at 4.1A, equating to a total of 20.5W. While the Miuzei's output is indeed efficient for Raspberry Pi applications, it cannot compete with the sheer capacity offered by the JUSTOP PSU. Users with high-performance computers requiring substantial power for components will find the JUSTOP's output invaluable, whereas Raspberry Pi users may find the Miuzei's power sufficient for lighter tasks.
Safety Features
Safety features are paramount in power supplies, and both products offer robust protections, albeit in different scopes. The Miuzei Raspberry Pi 4 Power Supply includes six types of protection, including overcurrent, short circuit, and overheating safeguards. This makes it a reliable choice for users worried about damaging their devices. On the other hand, the JUSTOP PSU also prioritises safety with its overvoltage protection, short circuit protection, and thermal overload cut-off protection. Additionally, it is certified by multiple safety agencies, including UKCA, CE, FCC, UL, and TUV, ensuring that it meets high safety standards. Users of both power supplies can feel secure knowing they are protected from potential hazards.
Design and Usability
The design and usability aspects of both products reflect their target audiences. The Miuzei Raspberry Pi 4 Power Supply is compact and includes a 1.5m cord, which is longer than many competitors, providing flexibility in placement. Its built-in on/off switch allows for convenient control without the hassle of unplugging. Meanwhile, the JUSTOP Black ATX 500W PSU features a sleek black design and comes with a 120mm cooling fan to ensure efficient heat dissipation during operation. This makes it suitable for desktop environments where aesthetics and performance are crucial. Both supplies offer user-friendly features, though the Miuzei's design is more aligned with casual users or hobbyists working with smaller devices.
Environmental Considerations
Environmental impact is an increasingly important consideration for consumers. The Miuzei Raspberry Pi 4 Power Supply is constructed with a V0-grade fireproof PC shell, enhancing safety in case of overheating. In terms of energy efficiency, the Miuzei supports a global input of 100-240V, ensuring that it can be used in various regions without compatibility issues. The JUSTOP PSU is RoHS compliant, which signifies that it meets strict environmental regulations aimed at reducing hazardous substances in electronic devices. Both products reflect a commitment to safety and environmental responsibility, making them suitable choices for eco-conscious consumers.
Brand Reputation and Warranty
Brand reputation can influence purchase decisions, and both JUSTOP and Miuzei have established themselves in the power supply market. The JUSTOP Black ATX 500W PSU comes with a one-year manufacturer warranty, providing reassurance of its quality and reliability. Miuzei, while not specifically mentioning a warranty in the provided data, is known for creating reliable accessories for Raspberry Pi and similar devices, which may inspire confidence among users. For those who prioritise brand trust and warranty coverage, the JUSTOP may have the edge due to its explicit warranty offering.
Which should you buy?
Deciding between the JUSTOP Black ATX 500W PSU and the Miuzei Raspberry Pi 4 Power Supply ultimately depends on your specific needs. If you are looking for a robust power supply for a desktop PC that can handle demanding applications, the JUSTOP PSU is the clear winner with its 500W output and extensive safety certifications. However, if your needs revolve around a Raspberry Pi setup, especially for casual projects, the Miuzei provides a more affordable and tailored solution with ample power for those specific applications. Both products excel in their respective categories, ensuring consumers can find the right fit for their power supply needs.
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