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Fasgear PCI-e 5.0 12VHPWR vs JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan

Updated August 2026The Fasgear PCI-e 5.0 12VHPWR is a budget-friendly option for high-performance GPUs, while the JUSTOP Black 700W PSU offers higher wattage and robust safety features. Depending on your needs, either could be a suitable choice.

The Fasgear PCI-e 5.0 12VHPWR is a budget-friendly option for high-performance GPUs, while the JUSTOP Black 700W PSU offers higher wattage and robust safety features. Depending on your needs, either could be a suitable choice.

Why Fasgear PCI-e 5.0 12VHPWR is better

lower price

Fasgear is £18.00 compared to JUSTOP's £29.95

GPU focus

Designed specifically for high-performance GPUs

cable management

Includes cable combs for better organization

Why JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan is better

higher wattage

JUSTOP provides 700W output compared to Fasgear's 600W

safety features

Includes multiple safety protections like OVP and SCP

cooling solution

Equipped with a 120mm quiet fan for better airflow

Overall score

Fasgear PCI-e 5.0 12VHPWR
75
JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan
85

Specifications

SpecFasgear PCI-e 5.0 12VHPWRJUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan
Max Output600W700W
Cooling FanNone120mm
Safety FeaturesBasicOVP, SCP, OPP
Price£18.00£29.95
CompatibilityRTX 30/40 SeriesATX 12V v.2.3

Dimension comparison

Fasgear PCI-e 5.0 12VHPWRJUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan

Pricing Comparison

When it comes to pricing, the Fasgear PCI-e 5.0 12VHPWR is priced at £18.00, while the JUSTOP Black 700W Power Supply Unit is priced at £29.95. The Fasgear product is significantly more affordable, saving you £11.95 compared to the JUSTOP PSU. This price difference may influence buyers looking for a budget-friendly option for their power supply needs. However, it is essential to consider the features and specifications offered by each product alongside their prices, as a lower price does not always equate to better value.

Design and Build Quality

The Fasgear PCI-e 5.0 is designed specifically for high-performance GPUs, particularly the RTX 30 and 40 series. It boasts a 30cm extension cable, allowing for a tidy installation with four transparent cable comb acrylic clips for better cable management. In contrast, the JUSTOP Black power supply features a standard ATX design with a 12CM quiet cooling fan, ensuring effective airflow while maintaining lower noise levels. The build quality of both products is reflected in their intended use; while Fasgear focuses on GPU extension, JUSTOP targets general power supply needs for desktop setups.

Performance Capabilities

In terms of performance, the Fasgear extension cable supports up to 600W output, which is suitable for high-end graphics cards. This makes it an excellent choice for gamers and professionals requiring reliable power for their high-performance builds. On the other hand, the JUSTOP Black power supply unit offers a maximum power output of 700W, providing additional headroom for more demanding systems or multiple components. This capability ensures that users can power various devices without the risk of overload, making it a versatile choice for system builders.

Compatibility

The Fasgear PCI-e 5.0 extension cable is specifically designed for compatibility with the GeForce RTX 4070, 4080, 4090, and 3090ti GPUs, which means it is tailored for advanced graphics performance. It is crucial to ensure that your power supply meets the required wattage for these GPUs, ideally between 500W-700W, for optimal performance. Conversely, the JUSTOP Black power supply unit adheres to the ATX 12V v.2.3 and EPS 12V v.2.92 standards, making it compatible with a wide range of motherboards and CPUs. This broader compatibility makes the JUSTOP unit a more flexible option for various build configurations.

Safety Features

Safety is a critical consideration when selecting power supplies. The Fasgear PCI-e extension cable comes with a caution regarding the need for two unoccupied 8-pin PCI-e ports on your power supply to function correctly, which highlights the importance of correct installation. The JUSTOP Black power supply, however, excels in safety features, offering over voltage protection, over power protection, short circuit protection, and thermal overload cut-off protection. With these multiple safety certifications, including CE, FCC, UL, and TUV, the JUSTOP PSU provides peace of mind for users concerned about electrical safety and reliability.

Cooling Solutions

Cooling is vital for maintaining system performance, particularly in high-demand scenarios. The Fasgear extension cable does not include a cooling mechanism, as it is an extension rather than a power supply. However, the JUSTOP PSU comes equipped with a 120mm quiet cooling fan, which helps to regulate temperatures and ensure efficient airflow within the system while maintaining a noise level of about 40dBA. This feature is particularly beneficial for users who prioritise a quiet operating environment, making the JUSTOP PSU a better choice for noise-sensitive setups.

User Experience and Installation

The user experience can vary significantly between these two products. The Fasgear extension cable is explicitly designed for users familiar with GPU installations, focusing on extending power connections for specific high-end graphics cards. This may require a degree of technical knowledge to ensure proper setup and compatibility. In contrast, the JUSTOP Black power supply unit is designed for ease of installation, featuring a variety of connectors, including a 20+4 pin, 4+4 pin 12V, multiple SATA, and more. This versatility makes it user-friendly for both novice builders and experienced system integrators.

Which should you buy?

Choosing between the Fasgear PCI-e 5.0 12VHPWR and the JUSTOP Black 700W Power Supply Unit ultimately depends on your specific needs and system configuration. If you are looking for a budget-friendly option specifically designed for high-performance GPUs and you already have a suitable power supply, the Fasgear extension cable at £18.00 may be the right fit. However, if you require a reliable power supply with higher wattage, robust safety features, and versatile compatibility for a broader range of components, the JUSTOP PSU at £29.95 is a solid investment. Consider your system's requirements and your level of technical expertise when making your final decision.

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Fasgear PCI-e 5.0 12VHPWR vs JUSTOP Black 700W Power Supply Unit ATX PSU With 120MM Quiet Fan | versusfinder