12V Monitor Power Supply Cord vs JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan
Updated August 2026 — The JUSTOP Black 700W Power Supply Unit offers superior performance and features compared to the 12V Monitor Power Supply Cord, making it the better choice for desktop PCs.
The JUSTOP Black 700W Power Supply Unit offers superior performance and features compared to the 12V Monitor Power Supply Cord, making it the better choice for desktop PCs.
Why 12V Monitor Power Supply Cord is better
lower price
The 12V Monitor Power Supply Cord is cheaper at £15.02.
silent operation
The 12V Monitor Power Supply Cord operates silently.
specific compatibility
The 12V Monitor Power Supply Cord is compatible with various monitor models.
Why JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan is better
higher wattage
The JUSTOP PSU provides 700W output.
better efficiency
The JUSTOP PSU is rated for over 70% efficiency.
advanced protection
The JUSTOP PSU includes multiple protection features.
Overall score
Specifications
| Spec | 12V Monitor Power Supply Cord | JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan |
|---|---|---|
| Brand | AmzFwing | JUSTOP |
| Price | £15.02 | £29.95 |
| Protection | Basic | Advanced |
| Compatibility | Monitors | PCs |
| Cooling Type | None | Fan |
Dimension comparison
Overview of the Products
In this comparison, we will explore the 12V Monitor Power Supply Cord by AmzFwing and the JUSTOP Black 700W Power Supply Unit. The former is priced at £15.02, while the latter costs £29.95. Both products serve distinct purposes, catering to different user needs in the realm of power supplies. The 12V Monitor Power Supply Cord is designed specifically for monitors requiring a 12V input, whereas the JUSTOP PSU is aimed at desktop PCs, providing a more robust power solution.
Design and Build Quality
The design and build quality of both power supplies reflect their intended uses. The 12V Monitor Power Supply Cord features a durable construction, ensuring reliability over time, with certifications including CE and RoHS. It comes with a 1.2-meter AC/DC power adapter and a 1.5-meter UK plug AC power cord, providing ample length for most setups. In contrast, the JUSTOP PSU boasts a 120mm cooling fan for efficient airflow, designed to keep noise levels down at around 40 dBA. Both products exhibit quality materials, but the JUSTOP's design prioritises cooling for prolonged use, making it more suitable for intensive PC applications.
Compatibility and Usage
Compatibility is a key area where these products diverge. The 12V Monitor Power Supply Cord is primarily compatible with various brands of monitors, including AOC and Dell models, supporting a range from 0.5A to 5A devices. This adapter is not suitable for 19V monitors, which could limit its usability with certain models. On the other hand, the JUSTOP PSU adheres to ATX and EPS standards, making it compatible with a wide array of motherboards and CPUs. Its single 8-pin 12V rail enhances stability, which is crucial for high-performance computing.
Protection Features
When it comes to protection features, both products offer essential safeguards, but they cater to different scenarios. The 12V Monitor Power Supply Cord includes over voltage, overload, and short circuit protections, ensuring safe operation for sensitive electronic devices. Meanwhile, the JUSTOP PSU goes a step further by providing multiple layers of protection, including over voltage protection, under voltage protection, overload protection, over power protection, and short circuit protection. This makes it a more secure choice for users who may stress their power supply with demanding components.
Performance and Efficiency
In terms of performance, the 12V Monitor Power Supply Cord delivers a maximum output of 60W, which is adequate for the monitors it supports. Its efficiency is not explicitly stated, but its design suggests reliable energy delivery for lower-powered devices. Conversely, the JUSTOP PSU has a power output of 700W and is rated for over 70% efficiency. This efficiency rating is particularly beneficial for users who require a power supply that can handle heavy loads while maintaining lower energy consumption over time.
Noise Levels
Noise levels can significantly impact user experience, particularly in quiet environments. The 12V Monitor Power Supply Cord operates silently as it does not have any active cooling components. This makes it a perfect choice for setups where noise is a concern. In contrast, the JUSTOP PSU features a 12cm cooling fan that operates at 40 dBA. While it is designed to be quiet, any audible noise may be a consideration for users seeking a completely silent system.
Price and Value
The pricing difference between the two products is notable, with the 12V Monitor Power Supply Cord at £15.02 and the JUSTOP PSU at £29.95. The lower price of the AmzFwing product makes it an attractive option for those who need a simple and effective solution for their monitors. However, the JUSTOP PSU, while more expensive, offers a comprehensive power solution with superior performance, efficiency, and protection features, making it a worthwhile investment for users building or upgrading a desktop system.
Which should you buy?
Choosing between the 12V Monitor Power Supply Cord and the JUSTOP Black 700W Power Supply Unit depends on your specific needs. If you require a reliable power supply for a monitor, the 12V Monitor Power Supply Cord is an excellent choice due to its affordability and compatibility with various models. However, for users looking to power a desktop PC with high-performance components, the JUSTOP PSU is undoubtedly the better option. Its higher wattage, efficiency, and advanced protection features justify the additional cost, making it suitable for demanding tasks. Ultimately, your decision should align with your power requirements and the devices you plan to use.
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