JUSTOP Black ATX 500W PSU vs be quiet! System Power 11 750W Power Supply

Price Comparison

The JUSTOP Black ATX 500W PSU is priced at £22.50, while the be quiet! System Power 11 750W Power Supply is considerably higher at £64.99. This significant price difference of £42.49 reflects the distinct features and capabilities of the two power supplies. The JUSTOP model targets users with basic power needs, making it a budget-friendly option for home and office desktop PCs. In contrast, the be quiet! model is designed for more demanding systems, particularly those requiring additional power for high-performance components like modern graphics cards.

Power Output

The JUSTOP Black ATX 500W PSU delivers a maximum power output of 500W, which is suitable for standard desktop configurations. Its single 8-pin (4+4 pin) 12V rail enhances stability and ensures safer power output. On the other hand, the be quiet! System Power 11 750W Power Supply boasts a power output of 750W, allowing it to handle power excursions up to double its rated power. This makes it more versatile and capable of supporting high-end gaming PCs or workstations that may require substantial power during intensive tasks.

Cooling Mechanism

Both power supplies feature a 120mm cooling fan, but they approach thermal management differently. The JUSTOP model employs a fluid dynamic ultra-quiet fan to maintain optimal temperatures, ensuring a balance between cooling efficiency and noise levels. In contrast, the be quiet! System Power 11 is designed for low noise operation, which is a hallmark of the brand. While both fans are effective, the be quiet! model's reputation for quiet performance may be more appealing to users who prioritise a silent computing experience.

Safety Features

In terms of safety features, the JUSTOP Black ATX 500W PSU includes multiple protections such as over voltage protection, over power protection, short circuit protection, and thermal overload cut-off protection. These features ensure that the power supply operates safely and protects connected components from potential damage. The be quiet! System Power 11 also incorporates extensive safety mechanisms, defending against overcurrents, over- and undervoltages, overtemperature, short circuits, and overloads. Both power supplies prioritise safety, but the be quiet! model's robust protections may offer greater peace of mind for users with high-performance builds.

Certification and Efficiency

The efficiency ratings of these power supplies further differentiate them. The JUSTOP Black ATX 500W PSU does not specify an efficiency rating but includes Power Factor Control (PFC) for better power management. In contrast, the be quiet! System Power 11 is 80 PLUS Bronze certified, with an efficiency rating of up to 90.0%. This certification indicates that the be quiet! model is designed for energy efficiency, making it a more cost-effective option over time, particularly for users who run their systems for extended periods.

Connector Options

In terms of connectors, the JUSTOP Black ATX 500W PSU is equipped with a variety of connections, including a 20+4 pin, 4+4 pin for CPU, SATA, and Molex connectors. This allows for compatibility with a range of components commonly found in standard desktop setups. The be quiet! System Power 11 750W Power Supply offers advanced connectivity, including native integration of the 12V-2x6 connector for next-generation PCIe 5.1 graphics cards, alongside standard PCIe 6+2-pin connectors for current-generation GPUs. This expanded connector support makes the be quiet! model particularly suitable for modern builds that require high-performance graphics capabilities.

Target Audience

The target audiences for these power supplies are notably different. The JUSTOP Black ATX 500W PSU is ideal for users seeking a reliable, cost-effective solution for basic computing needs, such as office tasks or light gaming. Its lower price point makes it accessible for budget-conscious consumers. Conversely, the be quiet! System Power 11 750W Power Supply is tailored for gamers and professionals who demand higher performance and reliability from their systems. With its capacity to support demanding components and robust features, it caters to enthusiasts looking to build powerful, future-proof rigs.

Which should you buy?

The decision between the JUSTOP Black ATX 500W PSU and the be quiet! System Power 11 750W Power Supply ultimately depends on your specific needs and budget. If you are building a standard desktop for everyday tasks and are looking for an economical option, the JUSTOP model at £22.50 offers good value with essential features and safety certifications. However, if you require a power supply for a high-performance gaming rig or a workstation, the be quiet! model at £64.99 provides significantly more power, advanced safety features, and superior efficiency, making it a worthwhile investment for demanding applications.