be quiet! Pure Power 13 M 1000W Power Supply vs JUSTOP Black ATX 500W PSU
Updated August 2026 — The be quiet! Pure Power 13 M 1000W Power Supply excels in performance and efficiency, making it the superior choice for demanding users. The JUSTOP Black ATX 500W PSU is a budget-friendly option for basic needs.
The be quiet! Pure Power 13 M 1000W Power Supply excels in performance and efficiency, making it the superior choice for demanding users. The JUSTOP Black ATX 500W PSU is a budget-friendly option for basic needs.
Why be quiet! Pure Power 13 M 1000W Power Supply is better
Power Output
1000W vs 500W
Efficiency Rating
80 PLUS Gold vs no rating
Connector Versatility
More connectors for high-end GPUs
Why JUSTOP Black ATX 500W PSU is better
Price
£22.50 vs £99.99
Basic Use
Sufficient for standard desktop PCs
Safety Certifications
Multiple safety certifications
Overall score
Specifications
| Spec | be quiet! Pure Power 13 M 1000W Power Supply | JUSTOP Black ATX 500W PSU |
|---|---|---|
| Efficiency | 80 PLUS Gold | Not specified |
| Modularity | Modular | Non-modular |
| Cooling Type | Smart Fan Control | Standard Fan |
| Protection Features | Advanced protections | Basic protections |
| Warranty | 5 years | 1 year |
Dimension comparison
Overview of the Products
The be quiet! Pure Power 13 M 1000W Power Supply is a high-performance unit designed for demanding systems, while the JUSTOP Black ATX 500W PSU is a budget-friendly option suitable for basic desktop PCs. With prices at £99.99 and £22.50, respectively, these power supplies cater to different user needs and system requirements.
The be quiet! Pure Power 13 M provides 1000W of power, making it ideal for high-end gaming setups and content creation. In contrast, the JUSTOP Black PSU, with its 500W output, is more suited for everyday computing tasks. This significant difference in wattage highlights the target audience for each product, with the be quiet! model aiming for enthusiasts and the JUSTOP appealing to casual users.
Efficiency and Performance
Efficiency is a critical factor when choosing a power supply, and the be quiet! Pure Power 13 M excels with an 80 PLUS Gold certification, indicating an efficiency rating of up to 94.4%. This high efficiency translates to lower power consumption and reduced electricity bills, making it a wise investment for long-term use.
On the other hand, the JUSTOP Black PSU does not specify an efficiency rating, which is a key consideration for users focused on energy savings. While it does offer stable power with a single 8-pin (4+4 pin) 12V rail, it lacks the advanced efficiency features found in the be quiet! model. Therefore, for those prioritising performance and efficiency, the be quiet! Pure Power 13 M is the superior choice.
Build Quality and Reliability
The build quality of a power supply can significantly impact its longevity and reliability. The be quiet! Pure Power 13 M is designed with robust components and features an LLC topology, which provides best-in-class voltage regulation. This ensures that the power supply can handle power excursions up to double its rated power, making it reliable even under demanding conditions.
Conversely, the JUSTOP Black PSU, while certified by multiple safety agencies, may not offer the same level of durability or performance under heavy loads. It includes over voltage, over power, short circuit, and thermal overload protection, but lacks the advanced voltage regulation technology found in the be quiet! model. Users looking for a dependable power supply for high-performance systems will find the be quiet! Pure Power 13 M to be a more reliable option.
Connector Options
Connector versatility is essential for accommodating various system configurations. The be quiet! Pure Power 13 M comes equipped with a native integration of the 12V-2x6 connector for next-generation PCIe 5.1 graphics cards, along with four PCIe 6+2-pin connectors. This wide range of connectors makes it suitable for current and future high-end GPUs, ensuring compatibility with a variety of setups.
In contrast, the JUSTOP Black PSU provides a more basic selection of connectors, including a 20+4 pin, 4+4 pin CPU connector, and several SATA and Molex connections. While these connectors are adequate for standard desktop builds, they may limit upgrades for users looking to install more powerful components. The be quiet! model clearly offers superior flexibility, making it the better choice for advanced users.
Cooling Solutions
Effective cooling is vital for maintaining optimal performance and longevity in power supplies. The be quiet! Pure Power 13 M features a fan that operates silently and only activates under higher loads, ensuring quiet operation during normal use. This design is particularly advantageous for gamers and professionals who require a quiet environment.
The JUSTOP Black PSU also includes a 120mm cooling fan designed to keep the unit cool. However, it does not have the same intelligent fan control system as the be quiet! model. Users who prioritise silent operation and efficient cooling will likely prefer the be quiet! Pure Power 13 M for its superior fan technology.
Aesthetic Appeal
Aesthetics may not be the primary concern when selecting a power supply, but they can influence a user's decision, especially in custom builds. The be quiet! Pure Power 13 M boasts a sleek design that complements high-end gaming rigs and media creation PCs. Its focus on a clean and organised layout enhances overall system appearance.
On the other hand, the JUSTOP Black PSU offers a simple black design that fits well in most setups but lacks the premium look and feel of the be quiet! model. For users who consider aesthetics an important factor in their build, the be quiet! Pure Power 13 M provides a more attractive option.
Price Comparison
Price is often a decisive factor in product selection. The be quiet! Pure Power 13 M is priced at £99.99, reflecting its advanced features and high-performance capabilities. In contrast, the JUSTOP Black PSU is significantly more affordable at £22.50, making it an attractive choice for budget-conscious consumers.
While the JUSTOP model offers excellent value for basic computing needs, it cannot compete with the extensive capabilities of the be quiet! Pure Power 13 M. Users should consider their specific requirements and whether the additional investment in the be quiet! model aligns with their performance needs.
Which should you buy?
Choosing between the be quiet! Pure Power 13 M 1000W Power Supply and the JUSTOP Black ATX 500W PSU ultimately depends on your individual needs. If you require a high-performance power supply with exceptional efficiency, reliability, and versatility for gaming or demanding applications, the be quiet! model is the clear winner. However, if you are looking for a cost-effective solution for a standard desktop setup, the JUSTOP Black PSU offers sufficient power and essential features at an unbeatable price.
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