be quiet! Pure Power 13 M 1000W Power Supply vs Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su
Updated August 2026 — The be quiet! Pure Power 13 M 1000W is the superior choice for high-performance systems, offering higher wattage and quieter operation. The Gigabyte UD850GM is a solid option for those needing a reliable and compact power supply.
The be quiet! Pure Power 13 M 1000W is the superior choice for high-performance systems, offering higher wattage and quieter operation. The Gigabyte UD850GM is a solid option for those needing a reliable and compact power supply.
Why be quiet! Pure Power 13 M 1000W Power Supply is better
higher wattage
1000W vs 850W
better efficiency
up to 94.4% efficiency
quieter operation
fan turns off under low load
Why Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su is better
lower price
£99.61 vs £99.99
compact size
more suitable for smaller builds
more protection features
includes OVP, OPP, SCP, UVP, OCP, OTP
Overall score
Specifications
| Spec | be quiet! Pure Power 13 M 1000W Power Supply | Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su |
|---|---|---|
| Brand | be quiet! | Gigabyte |
| Certification | 80 PLUS Gold | 80 PLUS Gold |
| Fan Size | 120mm | 120mm |
| Protection | basic | comprehensive |
| Cable Management | full modular | fully modular |
Dimension comparison
Price Comparison
When it comes to pricing, the be quiet! Pure Power 13 M 1000W is slightly more expensive than the Gigabyte UD850GM PG5 ICE, retailing at £99.99 compared to £99.61. The difference of just £0.38 may seem minimal, but it does reflect what each power supply offers in terms of wattage and features. The higher wattage of the be quiet! model at 1000W is significant for users who require more power, especially for high-performance gaming setups or workstations. In contrast, the Gigabyte supplies 850W, which is still adequate for many systems but may not cater to the most demanding hardware configurations.
Efficiency Ratings
Both power supplies are certified 80 PLUS Gold, indicating high efficiency, but the be quiet! Pure Power 13 M boasts a remarkable efficiency rating of up to 94.4%. This superior efficiency means reduced power consumption and lower electricity bills, which can be particularly beneficial over time for users running energy-hungry components. The Gigabyte UD850GM also provides efficient performance but does not specify an exact efficiency percentage, making it less clear how it compares in real-world usage. The higher efficiency of the be quiet! model may lead to cooler and quieter operation, which is a vital consideration for many users.
Modular Design
The modular design of both power supplies allows for improved cable management. The be quiet! Pure Power 13 M features full modularity, which simplifies cable routing and enhances airflow within the case. This design can result in lower noise levels and temperatures, contributing to a more stable system. Similarly, the Gigabyte UD850GM is fully modular as well, ensuring that only the necessary cables are connected, which supports an uncluttered build. However, both products excel in this category, offering similar benefits in terms of organisation and airflow.
Power Delivery
In terms of power delivery, the be quiet! Pure Power 13 M stands out with its robust 1000W output through a single massive +12V rail. This setup is particularly advantageous for systems that may experience power excursions, as it can handle demands of up to double its rated power without any issues. On the other hand, the Gigabyte UD850GM delivers 850W, which is still powerful but may not support extreme performance setups as effectively. Users with high-end graphics cards and processors may find the be quiet! model more suitable for their needs.
Fan and Noise Levels
The be quiet! Pure Power 13 M is designed with a unique feature where the fan turns off completely under low load, ensuring silent operation during less demanding tasks. This, combined with optimised fan blades, contributes to its reputation for quiet performance in any load scenario. In contrast, the Gigabyte UD850GM employs a 120mm smart hydraulic bearing fan, which is designed for efficient cooling. While both power supplies aim for quiet operation, the be quiet! model explicitly highlights its silent capabilities, making it a better choice for users prioritising noise reduction.
Protection Features
Both power supplies include multiple protection features to ensure safe operation. The be quiet! Pure Power 13 M incorporates reliable voltage regulation and efficiency, while the Gigabyte UD850GM offers a comprehensive suite of protections, including OVP (Over Voltage Protection), OPP (Over Power Protection), SCP (Short Circuit Protection), UVP (Under Voltage Protection), OCP (Over Current Protection), and OTP (Over Temperature Protection). Although both models provide a safety net for users, the Gigabyte's specific list of protections may offer additional peace of mind for those concerned about potential power issues.
User Experience and Build Quality
The be quiet! Pure Power 13 M is known for its premium build quality, leveraging high-quality materials that contribute to its reliability and performance. The attention to detail in design focuses on creating a system that is both efficient and quiet, appealing to gamers and content creators alike. On the other hand, the Gigabyte UD850GM is constructed with 100% Japanese capacitors, which are renowned for their durability and performance. Both brands have strong reputations, but the specific emphasis on quiet operation in the be quiet! model may make it more attractive for users sensitive to noise.
Which should you buy?
Choosing between the be quiet! Pure Power 13 M 1000W and the Gigabyte UD850GM PG5 ICE 80 Plus Gold requires consideration of your specific needs. If you need a higher wattage power supply for a demanding setup and value ultra-quiet operation, the be quiet! model is the better choice at £99.99. However, if you are looking for a more compact power supply with solid protection features and a slightly lower price of £99.61, the Gigabyte UD850GM remains a strong contender. Ultimately, both power supplies deliver excellent performance, but your final decision should be based on your system requirements and priorities.
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