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JUSTOP Black 750W PSU vs be quiet! Power Zone 1000W Power Supply

Updated August 2026The be quiet! Power Zone 1000W Power Supply outperforms the JUSTOP Black 750W PSU in efficiency, cooling, and features, making it the better choice for high-performance systems.

The be quiet! Power Zone 1000W Power Supply outperforms the JUSTOP Black 750W PSU in efficiency, cooling, and features, making it the better choice for high-performance systems.

Why JUSTOP Black 750W PSU is better

price

JUSTOP is significantly cheaper at £32.95

basic features

sufficient for mid-range systems

compact size

smaller power output for less demanding builds

Why be quiet! Power Zone 1000W Power Supply is better

power output

1000W vs 750W for high-performance systems

efficiency

80 PLUS Platinum certification with up to 94.0% efficiency

cooling

quieter operation with a large 140mm fan

Overall score

JUSTOP Black 750W PSU
65
be quiet! Power Zone 1000W Power Supply
85

Specifications

SpecJUSTOP Black 750W PSUbe quiet! Power Zone 1000W Power Supply
BrandJUSTOPbe quiet!
Current Price£32.95£143.99
Efficiency RatingN/A80 PLUS Platinum
Cooling Type120mm fan140mm fan
Protection Features4 types5 types

Dimension comparison

JUSTOP Black 750W PSUbe quiet! Power Zone 1000W Power Supply

Overview

In this comparison, we delve into two power supplies: the JUSTOP Black 750W PSU and the be quiet! Power Zone 1000W Power Supply. The former is priced at £32.95, while the latter is significantly more expensive at £143.99. Both products cater to distinct needs within the power supply market, providing various features that cater to different types of users.

Power Output

The most notable difference between the JUSTOP Black 750W PSU and the be quiet! Power Zone 1000W Power Supply is their power output. The JUSTOP model offers a reliable 750W, which is suitable for mid-range systems, while the be quiet! model provides a robust 1000W. This additional 250W allows for greater flexibility in building high-performance gaming rigs or workstations that demand more power from components, particularly when using high-end graphics cards or multiple GPU setups.

Efficiency Ratings

Efficiency is a key factor in power supplies, and the be quiet! Power Zone 1000W boasts an impressive 80 PLUS Platinum certification with an energy efficiency rating of up to 94.0%. This high efficiency translates to lower power consumption and reduced electricity bills over time. In contrast, the JUSTOP Black 750W PSU does not specify its efficiency rating, which may raise questions for users concerned about long-term operational costs.

Cooling Solutions

Cooling capabilities vary significantly between the two models. The JUSTOP Black 750W PSU features a 120mm cooling fan aimed at maintaining optimal temperatures during operation. However, the be quiet! Power Zone 1000W takes cooling to the next level with a large Pure Wings 3 140mm fan that not only cools efficiently but also operates quietly. This fan can even turn off at low loads, reducing noise when the system is less demanding. Such advancements in cooling technology make the be quiet! model a preferable choice for those focused on silent operation.

Protection Features

When it comes to safety, both power supplies include several protective features. The JUSTOP Black 750W PSU comes equipped with over voltage protection, over power protection, short circuit protection, and thermal overload cut-off protection, ensuring a secure environment for connected components. The be quiet! Power Zone 1000W also incorporates extensive protection measures and offers a single massive 12V rail that can handle power excursions up to double its rated capacity, providing users with peace of mind when pushing their systems to their limits.

Connector Options

Connector availability is crucial for compatibility with various components. The JUSTOP Black 750W PSU offers a decent range of connectors, including 1x 24-Pin (20+4), 1x 8-Pin 12V (4+4), 6x SATA, 1x 4-Pin Molex, and 1x 8-Pin PCI-E (6+2). In contrast, the be quiet! Power Zone 1000W is designed with modern systems in mind, featuring native integration for the 12V-2x6 connector for next-generation PCIe 5.1 graphics cards, alongside three PCIe 6+2-pin connectors for current-generation GPUs. This makes the be quiet! model more future-proof and versatile for users looking to upgrade their systems.

Noise Levels

Noise levels can greatly affect the user experience, especially in quiet environments. The JUSTOP Black 750W PSU's noise levels are not specified, leaving potential buyers in the dark regarding its operational sound. On the other hand, the be quiet! Power Zone 1000W is designed with sound in mind; its large fan operates quietly, and it can completely shut off during low load conditions. This feature not only enhances overall user comfort but also promotes a more enjoyable gaming or work environment.

Price Consideration

The price difference between the two power supplies is substantial, with the JUSTOP Black 750W PSU retailing for £32.95 and the be quiet! Power Zone 1000W Power Supply priced at £143.99. While the JUSTOP model is a budget-friendly option suitable for standard builds, the premium price of the be quiet! model reflects its advanced features, efficiency, and reliability. For users with high-performance needs, the investment in the be quiet! model may be justified.

Which should you buy?

Deciding between the JUSTOP Black 750W PSU and the be quiet! Power Zone 1000W Power Supply hinges on your specific requirements and budget. If you are looking for an affordable solution for a mid-range system, the JUSTOP model offers sufficient power and basic protections. However, if you require higher efficiency, superior cooling, and the capability to support advanced systems, the be quiet! model's features and reliability make it worth the higher price. Ultimately, your choice should be guided by your system's power demands and your willingness to invest in quality components.

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JUSTOP Black 750W PSU vs be quiet! Power Zone 1000W Power Supply | versusfinder