Auotac 850W Fully Modular Power Supply, 80+ Gold vs be quiet! Pure Power 13 M 1000W Power Supply, 80
Updated August 2026 — Auotac 850W Fully Modular Power Supply, 80+ Gold wins on modularity and warranty, be quiet! Pure Power 13 M 1000W Power Supply, 80 wins on power output and noise level.
The Auotac 850W offers great value for standard setups, while the be quiet! Pure Power 13 M excels in higher capacity and efficiency.
Why Auotac 850W Fully Modular Power Supply, 80+ Gold is better
Price
Auotac is significantly cheaper.
Modularity
Fully modular design reduces cable clutter.
RGB Features
Includes RGB lighting for customization.
Why be quiet! Pure Power 13 M 1000W Power Supply, 80 is better
Capacity
Higher wattage for power-hungry systems.
Efficiency
Higher efficiency rating of up to 94.4%.
Cooling
Semi-passive cooling for quieter operation.
Overall score
Specifications
| Spec | Auotac 850W Fully Modular Power Supply, 80+ Gold | be quiet! Pure Power 13 M 1000W Power Supply, 80 |
|---|---|---|
| Certification | 80 Plus Gold | 80 Plus Gold |
| Modular | Fully | Semi |
| Fan Type | RGB | 120mm |
| Rail Design | Multiple | Single |
| Transient Load | Standard | High |
Dimension comparison
Overview of Power Supplies
In the world of power supplies, the Auotac 850W Fully Modular Power Supply and the be quiet! Pure Power 13 M 1000W Power Supply stand out for their performance and efficiency. With prices of $79.99 and $139.90 respectively, the Auotac is about 43% cheaper than the be quiet!. Both units are 80 Plus Gold certified, ensuring high efficiency, but they cater to different power needs and system configurations.
Efficiency and Performance
The Auotac 850W boasts a 92% efficiency rating, which is impressive for its 850W capacity. This means it effectively delivers power to your components while minimizing energy loss. On the other hand, the be quiet! Pure Power 13 M offers slightly higher efficiency with a rating of up to 94.4%, making it a better choice for users aiming for lower operational costs and cooler system performance. This 2.4% difference in efficiency can translate to noticeable savings in electricity bills over time, especially in high-demand setups.
Modular Design and Cable Management
The Auotac 850W features a fully modular design, allowing users to connect only the cables they need. This not only reduces cable clutter but also enhances airflow within the case. In comparison, the be quiet! Pure Power 13 M also offers modular cables, simplifying cable management. Both power supplies prioritize ease of use and system aesthetics, but the Auotac's dragon-patterned cables add a unique visual flair that might appeal to gamers looking to customize their builds.
Cooling Solutions
Cooling is a critical aspect of power supply performance, and both models have unique approaches. The Auotac includes a 140mm low-noise RGB fan that operates quietly and features adjustable lighting modes for visual customization. In contrast, the be quiet! Pure Power 13 M utilizes a semi-passive design, where the fan remains off under low loads, enhancing silence during light usage. However, when additional cooling is needed, its 120mm fan becomes active. This feature may benefit users who prioritize a quiet computing environment, especially in home theaters or offices.
Capacity and Future-Proofing
The Auotac 850W is suitable for most gaming and productivity setups, providing ample power for high-performance components. However, the be quiet! Pure Power 13 M offers a higher capacity of 1000W, making it more future-proof for power-hungry systems, particularly those with overclocked GPUs. The ability to handle transient loads is also superior in the be quiet!, as it can manage power excursions up to double its rated power. This makes it a more reliable option for users planning to upgrade their systems in the future.
Build Quality and Components
Both power supplies are built using high-quality components, but their focus differs slightly. The Auotac features 105°C-rated Japanese capacitors, promising durability and stability, which is crucial for maintaining performance during prolonged use. Meanwhile, the be quiet! Pure Power 13 M emphasizes LLC topology to provide excellent voltage regulation. This ensures that users experience stable power delivery, especially under demanding conditions. The quality of components in both ensures reliability, but the be quiet! leans more towards delivering top-tier voltage stability.
Price Considerations
With the Auotac priced at $79.99 and the be quiet! at $139.90, there is a significant price difference of $59.91. This makes the Auotac roughly 43% less expensive, which can be a major factor for budget-conscious consumers. However, the higher price of the be quiet! is justified by its increased capacity, efficiency, and advanced features. For users with a more demanding power requirement, investing in the be quiet! may lead to better long-term savings despite the upfront cost.
Which should you buy?
Choosing between the Auotac 850W and the be quiet! Pure Power 13 M ultimately depends on your specific needs and budget. If you seek an affordable, efficient power supply for a standard gaming rig, the Auotac 850W stands out with its lower price and modular design. However, if you require higher wattage for overclocked systems and value superior cooling and efficiency features, the be quiet! Pure Power 13 M is the better investment. Both power supplies offer solid performance, but your choice should align with your power requirements and financial considerations.

