JUSTOP Black 650W PSU vs 24V / 12V to 5V 5A Power Buck Converter DC-DC Power Down Module Power Supply Boa
Updated August 2026 — The JUSTOP Black 650W PSU is ideal for high-performance desktop setups, while the tinshow converter is a budget-friendly option for smaller devices.
The JUSTOP Black 650W PSU is ideal for high-performance desktop setups, while the tinshow converter is a budget-friendly option for smaller devices.
Why JUSTOP Black 650W PSU is better
power output
650W vs 5A
safety features
comprehensive protection measures
connector variety
supports multiple device connections
Why 24V / 12V to 5V 5A Power Buck Converter DC-DC Power Down Module Power Supply Boa is better
price
£7.69 vs £29.99
portability
compact and lightweight design
ease of use
simple USB connectivity
Overall score
Specifications
| Spec | JUSTOP Black 650W PSU | 24V / 12V to 5V 5A Power Buck Converter DC-DC Power Down Module Power Supply Boa |
|---|---|---|
| Brand | JUSTOP | tinshow |
| Current Output | 650W | 5A |
| Price | £29.99 | £7.69 |
| Cooling | 120mm fan | none |
| USB Port | no | yes |
| Voltage Input | N/A | 12V/24V |
Dimension comparison
Introduction to Power Supply Options
When it comes to selecting a power supply, the choice between the JUSTOP Black 650W PSU and the 24V / 12V to 5V 5A Power Buck Converter is crucial. Each product caters to distinct needs in desktop and portable applications. The JUSTOP PSU is priced at £29.99, offering robust power for desktop setups, while the tinshow converter is much more affordable at £7.69, designed for smaller devices. Understanding the differences will help you make an informed decision based on your specific requirements.
Overview of the JUSTOP Black 650W PSU
The JUSTOP Black 650W PSU is a high-capacity power supply designed primarily for desktop computers. It delivers 650W of power, making it suitable for demanding applications and components. The unit features a 120mm cooling fan, ensuring efficient heat dissipation during operation. With safety certifications including UKCA, CE, FCC, UL, and TUV, the JUSTOP PSU prioritises safety and reliability. Its connectors—20+4 pin, 4+4 pin, SATA, and PCIe—provide versatile compatibility with various systems.
Overview of the 24V / 12V to 5V 5A Power Buck Converter
The 24V / 12V to 5V 5A Power Buck Converter is an economical solution for powering smaller devices. Priced at £7.69, it offers a conversion from higher voltage (12V or 24V) down to a stable 5V output with a maximum current of 5A. This converter features a compact design, weighing only 22g, and includes a USB port for easy connectivity. It is equipped with a fast charge recognition chip, which enhances its efficiency in powering devices like smartphones and tablets.
Performance Comparison
In terms of performance, the JUSTOP Black 650W PSU is designed for high-demand environments, providing a stable power output with a single 8-pin 12V rail. This design allows for better stability and safer power delivery, crucial for powering multiple components in a desktop PC. Meanwhile, the 24V / 12V to 5V 5A Power Buck Converter, while less powerful, is efficient for its purpose, supporting a wide voltage range and ensuring reliable performance for smaller devices. Its design is optimised for quick charging, making it particularly useful for mobile devices.
Safety Features and Reliability
Safety is paramount in power supply products, and both the JUSTOP PSU and the buck converter incorporate protective measures. The JUSTOP PSU includes over voltage protection, over power protection, short circuit protection, and thermal overload cut-off protection, emphasising its reliability in a desktop setting. On the other hand, the tinshow converter comes with an independent anti-static package, which protects the module during transport and storage. While both products provide safety features, the JUSTOP PSU offers a more comprehensive safety system suited for high-performance environments.
Connectivity and Compatibility
The JUSTOP Black 650W PSU supports a wide range of connectors, including a 20+4 pin connector for motherboards, multiple SATA connections for drives, and a PCIe connector for graphics cards. This versatility ensures that it can be integrated into a variety of desktop setups. In contrast, the 24V / 12V to 5V 5A Power Buck Converter is designed for simplicity, featuring a USB port and a DC plug among its connectivity options. This makes it highly compatible with portable devices, enhancing its usability across different platforms.
Size and Portability
When considering size and portability, the 24V / 12V to 5V 5A Power Buck Converter excels with its compact dimensions of 63 × 27 × 10mm and lightweight build of just 22g. This makes it an ideal choice for users who require a portable power solution. Conversely, the JUSTOP PSU, while robust at 650W, is larger and intended for stationary desktop use. Therefore, if portability is a primary concern, the tinshow converter is the clear winner in this category.
Price Comparison
Price is a significant factor in any purchasing decision. The JUSTOP Black 650W PSU retails for £29.99, reflecting its capabilities as a high-capacity power supply suited for desktop computers. In contrast, the 24V / 12V to 5V 5A Power Buck Converter is priced at just £7.69, making it an exceptionally budget-friendly option for users needing a simple power solution for smaller devices. The substantial price difference highlights the distinct target markets for each product—high-performance computing versus portable charging.
Which should you buy?
Ultimately, your choice between the JUSTOP Black 650W PSU and the 24V / 12V to 5V 5A Power Buck Converter should hinge on your specific needs. If you're building or upgrading a desktop computer that requires robust, stable power, the JUSTOP PSU is the superior choice with its extensive safety features and high power output. However, if you're looking for an affordable, compact solution for charging smaller devices, the tinshow converter is an excellent, budget-friendly option. Assess your requirements carefully to determine which product aligns best with your power supply needs.
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