JUSTOP Black 650W PSU vs SinLoon PC Power on Button Desktop Computer Power Switch External Remote Start 5
Updated August 2026 — The JUSTOP Black 650W PSU is a reliable power supply for desktop PCs, while the SinLoon switch offers convenience at a low price. Choose based on your specific needs.
The JUSTOP Black 650W PSU is a reliable power supply for desktop PCs, while the SinLoon switch offers convenience at a low price. Choose based on your specific needs.
Why JUSTOP Black 650W PSU is better
power output
650W PSU provides stable power for high-performance components
safety features
Includes multiple protection features for reliability
build quality
Robust design certified by safety agencies
Why SinLoon PC Power on Button Desktop Computer Power Switch External Remote Start 5 is better
price
More affordable at £8.99
ease of installation
Simple setup with self-adhesive backing
accessibility
Extends power button accessibility for convenience
Overall score
Specifications
| Spec | JUSTOP Black 650W PSU | SinLoon PC Power on Button Desktop Computer Power Switch External Remote Start 5 |
|---|---|---|
| Brand | JUSTOP | SinLoon |
| Current Price | £29.99 | £8.99 |
| Power Rating | 650W | N/A |
| Cable Length | N/A | 1.8M |
| Cooling Fan | 120mm | N/A |
Dimension comparison
Overview of the Products
In this comparison, we will examine the JUSTOP Black 650W PSU and the SinLoon PC Power on Button Desktop Computer Power Switch. The former is a power supply unit designed for desktop PCs, while the latter is an external power switch that facilitates easier access to the power function of a computer. The price difference is significant, with the JUSTOP PSU retailing at £29.99 and the SinLoon switch priced at £8.99.
Design and Build Quality
The JUSTOP Black 650W PSU features a robust design aimed at providing stable power to desktop systems. It includes a 120mm cooling fan, which is essential for maintaining optimal temperatures during operation. This unit is certified by several safety agencies, including UKCA, CE, FCC, UL, and TUV, ensuring a high standard of reliability. On the other hand, the SinLoon power switch is designed for convenience rather than heavy-duty use. It features a cable length of 1.8 metres, making it easy to position in a user-friendly location. The materials include copper, plastic, and an ABS shell, focusing on a lightweight design suitable for its function.
Functionality
Functionality is a critical aspect where both products serve different purposes. The JUSTOP Black 650W PSU delivers 650 watts of power, providing a stable and reliable output for various components within a desktop PC. It incorporates a single 8-pin (4+4 pin) 12v rail, enhancing stability and safety. In contrast, the SinLoon power switch serves as an external ON/OFF switch, allowing users to power their computers more conveniently. It can be used alongside the original power button, enabling users to retain both functionalities without any hassle. This versatility makes it a great addition for those who frequently need to reach their power button.
Installation Process
The installation process differs significantly between these two products. The JUSTOP Black 650W PSU requires careful integration into a PC case, connecting various cables such as the 20+4 pin and SATA connectors among others. This process necessitates some technical knowledge to ensure a secure installation. Conversely, the SinLoon power switch is designed for simplicity and ease of use. Users can easily connect the POWER LED and POWER SW connectors to the motherboard and simply stick the switch in the desired location using its self-adhesive backing. Therefore, for those less versed in hardware installation, the SinLoon switch provides a more approachable solution.
Performance and Capability
When it comes to performance, the JUSTOP Black 650W PSU is built to deliver consistent power to high-performance components, making it an ideal choice for gaming rigs or workstation PCs. The protection features, including over voltage protection and thermal overload cut-off, further enhance its reliability during operation. In contrast, the SinLoon power switch does not involve performance metrics in the same way; instead, its effectiveness lies in its ability to extend the power button’s accessibility. This switch does not directly influence the computer's performance but rather enhances user experience by making it easier to power the system on and off.
Compatibility
Compatibility is a major consideration when selecting either product. The JUSTOP Black 650W PSU is designed to work with a wide range of desktop components, ensuring that it can support various builds effectively. It includes multiple connectors, such as three SATA and one PCIe connection, catering to different hardware requirements. Meanwhile, the SinLoon power switch is quite universally compatible as it can replace old or damaged power buttons in most desktop computers. The simple four-pin connector setup allows it to fit into the majority of motherboards without any issues, making it a versatile accessory for various setups.
Price Point
The price point is a significant distinguishing factor between these two products. The JUSTOP Black 650W PSU is priced at £29.99, reflecting its role as a core component in a computer setup that requires reliable power delivery. In comparison, the SinLoon power switch is much more affordable at £8.99, appealing to users looking for a budget-friendly solution to enhance their computer’s usability. This price difference highlights the varying roles that these products fulfil within a computer system, with the PSU being a critical investment for performance, while the switch acts as a supplementary convenience.
Which should you buy?
Choosing between the JUSTOP Black 650W PSU and the SinLoon PC Power on Button ultimately depends on your needs. If you're building or upgrading a desktop PC, the JUSTOP PSU is an essential component that ensures stable power delivery and safety for your system. Conversely, if you are simply looking for a way to make powering your computer more convenient, the SinLoon switch is an excellent budget-friendly option that enhances usability without requiring extensive installation knowledge. Each product serves its purpose effectively, with the PSU focusing on power stability and the switch prioritising user accessibility.
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