5V Power Supply for Polycom VVX 150 250 350 450 2200-48872-001 1465-48871-001 vs JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan
Updated August 2026 — The 5V Power Supply for Polycom VVX series is ideal for VoIP phones, while the JUSTOP Black 700W Power Supply Unit is better suited for high-capacity desktop needs.
The 5V Power Supply for Polycom VVX series is ideal for VoIP phones, while the JUSTOP Black 700W Power Supply Unit is better suited for high-capacity desktop needs.
Why 5V Power Supply for Polycom VVX 150 250 350 450 2200-48872-001 1465-48871-001 is better
affordable price
£11.98 is cheaper than £29.95
compact design
smaller size for limited spaces
specific compatibility
designed for Polycom VoIP phones
Why JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan is better
higher power output
700W vs 15W for demanding applications
extensive compatibility
supports various desktop components
multiple safety features
includes OVP, UVP, OLP, OPP, SCP
Overall score
Specifications
| Spec | 5V Power Supply for Polycom VVX 150 250 350 450 2200-48872-001 1465-48871-001 | JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan |
|---|---|---|
| Input Voltage | 100-240V AC | 220-240V AC |
| Output Voltage | 5V DC | 12V DC |
| Max Current | 3A | 58.33A |
| Protection | limited | OVP, UVP, OLP, OPP, SCP |
| Price | £11.98 | £29.95 |
Dimension comparison
Overview of the Products
When it comes to power supplies, choosing the right one can significantly impact the performance of your devices. The 5V Power Supply for Polycom VVX series is specifically designed for VoIP phones, while the JUSTOP Black 700W Power Supply Unit caters to desktop PC needs. Each product serves its unique purpose, making them suitable for different user requirements.
The 5V Power Supply for Polycom VVX series is priced at £11.98, emphasising affordability for those needing a dedicated power source for compatible VoIP phones. In contrast, the JUSTOP Black 700W Power Supply Unit, priced at £29.95, caters to users looking for a high-capacity solution for gaming or professional PCs. Both products highlight the diversity in the power supply market.
Design and Build Quality
The design of a power supply can significantly affect its functionality and compatibility. The 5V Power Supply for Polycom VVX series features a compact and lightweight design, ideal for users with limited space. Its 6.6 ft cable length offers flexibility for placement, ensuring that your VoIP phone can be situated conveniently without the hassle of short cords.
Conversely, the JUSTOP Black 700W Power Supply Unit boasts a robust design with multiple connectors, making it suitable for various components in a desktop setup. Its dimensions ensure a snug fit in standard ATX cases, while a 120mm quiet cooling fan enhances airflow and reduces noise. This attention to design and cooling solutions is crucial for maintaining performance under load.
Compatibility
Compatibility is a key factor when selecting a power supply. The 5V Power Supply for Polycom VVX series is tailored for specific VoIP phone models, including the Polycom VVX 150, 250, 350, and 450, among others. This focused compatibility ensures that users can rely on it for seamless operation without worrying about electrical mismatches.
On the other hand, the JUSTOP Black 700W Power Supply Unit is built to comply with Intel ATX 12V v.2.3 and EPS 12V v.2.92 standards, making it a versatile option for various desktop systems. Its single 8-Pin (4+4) 12V rail contributes to stability, ensuring that users can safely power their CPUs and motherboards. The broad compatibility of the JUSTOP power supply makes it ideal for builders who may switch components frequently.
Performance
Performance is critical when evaluating power supplies. The 5V Power Supply for Polycom VVX series provides a steady output of 5V DC and a maximum output current of 3A, translating to a maximum output power of 15W. This level of performance is adequate for powering VoIP phones, ensuring that they operate efficiently without interruptions.
In contrast, the JUSTOP Black 700W Power Supply Unit offers a significantly higher power output of 700W, making it suitable for demanding applications such as gaming or graphic design. With an efficiency rating of over 70%, this power supply is designed to handle high workloads, offering users the reliability they need for their systems without the risk of overheating or power failure.
Safety Features
Safety is paramount when dealing with electrical devices, and both power supplies come equipped with essential protective features. The 5V Power Supply for Polycom VVX series specifically notes that it is only compatible with designated VoIP phone models, reducing the risk of damage due to incorrect use.
The JUSTOP Black 700W Power Supply Unit, however, goes further by incorporating multiple safety mechanisms, including over-voltage protection, over-power protection, short circuit protection, and thermal overload cut-off protection. These features not only safeguard the power supply itself but also protect the components it powers, providing peace of mind for users investing in high-end systems.
Price Point
Pricing can heavily influence purchasing decisions, and there is a clear difference between the two products. The 5V Power Supply for Polycom VVX series is priced at an economical £11.98, making it an accessible option for those specifically in need of a power supply for their VoIP phones. Its price reflects its targeted functionality and straightforward design.
In contrast, the JUSTOP Black 700W Power Supply Unit is available for £29.95. This price point is justified by its higher power output, extensive compatibility, and additional safety features. While it is a more significant investment, it caters to a broader audience, including gamers and professionals who require reliable and potent power solutions for their desktops.
User Experience
User experience can vary greatly between these two power supplies due to their intended applications. Users of the 5V Power Supply for Polycom VVX series report satisfaction with its straightforward setup and reliable performance in powering their VoIP phones. The long cable length adds convenience, allowing for flexible placement in office environments.
Conversely, users of the JUSTOP Black 700W Power Supply Unit appreciate its quiet operation due to the 120mm cooling fan, which helps maintain a tranquil workspace even under load. The extensive range of connectors provides versatility for custom builds, allowing users to connect various components without hassle. This adaptability is particularly beneficial for those who frequently upgrade their systems.
Which should you buy?
Ultimately, your choice between the 5V Power Supply for Polycom VVX series and the JUSTOP Black 700W Power Supply Unit should be based on your specific needs. If you are looking for an affordable and reliable power supply specifically for Polycom VoIP phones, the 5V Power Supply is an excellent choice at £11.98. However, if you require a high-capacity power supply for a desktop PC with the flexibility to support multiple components, the JUSTOP Black 700W Power Supply Unit at £29.95 is the superior option. Each product serves its purpose well, catering to different segments of the market, making your intended use the deciding factor.
versusfinder.com is a participant in the Amazon Services LLC Associates Programme and the Amazon EU Associates Programme. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

