Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su vs be quiet! System Power 11 750W Power Supply
Updated August 2026 — The Gigabyte UD850GM offers superior performance and features, making it the better choice for high-demand systems, while the be quiet! System Power 11 is a solid budget option.
The Gigabyte UD850GM offers superior performance and features, making it the better choice for high-demand systems, while the be quiet! System Power 11 is a solid budget option.
Why Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su is better
higher capacity
850w vs 750w
better efficiency
80 PLUS Gold vs Bronze
more features
fully modular design vs non-modular
Why be quiet! System Power 11 750W Power Supply is better
lower price
£64.99 vs £99.61
quiet operation
designed for low noise
sufficient for mid-range
adequate for most setups
Overall score
Specifications
| Spec | Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su | be quiet! System Power 11 750W Power Supply |
|---|---|---|
| Brand | Gigabyte | be quiet! |
| Wattage | 850W | 750W |
| Certification | 80 PLUS Gold | 80 PLUS Bronze |
| Fan Size | 120mm | 120mm |
| Modular | Fully | Non-modular |
Dimension comparison
Overview of Power Supplies
In the world of power supplies, the Gigabyte UD850GM PG5 ICE and the be quiet! System Power 11 offer distinct advantages for different users. The Gigabyte UD850GM is a fully modular unit boasting an 850w capacity and 80 PLUS Gold certification, while the be quiet! System Power 11 provides a slightly lower capacity of 750w but comes at a more affordable price point. Each model targets specific needs in terms of performance and budget.
Power Capacity and Efficiency
When it comes to power capacity, the Gigabyte UD850GM leads with its impressive 850w output, making it ideal for high-performance systems that demand more power. In contrast, the be quiet! System Power 11 offers 750w, which is sufficient for most mid-range setups but may fall short for users with demanding graphics cards or extensive hardware. The Gigabyte's 80 PLUS Gold certification signifies a higher efficiency, ensuring that it operates with a rating of up to 90% efficiency under typical loads, compared to the System Power 11's 80 PLUS Bronze rating, which offers up to 90% efficiency as well but may not be as effective under heavy loads.
Build Quality and Design
Both power supplies exhibit strong build quality, but they cater to different preferences. The Gigabyte UD850GM features a fully modular design, allowing users to connect only the cables they need, reducing clutter and improving airflow within the case. The compact size of the unit enhances compatibility with various cases. On the other hand, the be quiet! System Power 11, while not fully modular, is equipped with a temperature-controlled 120mm fan designed for low noise operation. This makes it particularly appealing for users prioritising quiet computing, though it sacrifices some modularity.
Thermal Management
Thermal management is crucial for maintaining performance and longevity in power supplies. The Gigabyte UD850GM utilises a 120mm smart hydraulic bearing fan, which optimises airflow while keeping noise levels low. Additionally, its advanced thermal solutions contribute to efficient cooling during high loads. The be quiet! System Power 11 also features a 120mm quality fan, renowned for its low noise operation, which is a hallmark of the be quiet! brand. However, the lack of a fully modular design may lead to less efficient airflow compared to the Gigabyte model.
Protection Features
Safety is paramount in power supplies, and both models come equipped with essential protection features. The Gigabyte UD850GM includes 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). These multiple layers of protection ensure that the unit can handle unexpected electrical issues effectively. In comparison, the be quiet! System Power 11 also incorporates protections against overcurrents, over- and undervoltages, overtemperature, short circuits, and overloads, ensuring the safety of connected components. However, the more comprehensive suite of protection features in the Gigabyte unit may provide a slight edge in reliability.
Pricing and Value
Price is a significant factor when choosing between power supplies. The Gigabyte UD850GM is priced at £99.61, reflecting its higher capacity and advanced features. Conversely, the be quiet! System Power 11 is available for £64.99, making it a more budget-friendly option for users who do not require the maximum wattage. While the Gigabyte offers enhanced performance and efficiency, the lower price point of the be quiet! model makes it an attractive choice for those looking to save money without compromising too much on quality.
Target Audience
The intended audience for both power supplies differs based on their specifications and pricing. The Gigabyte UD850GM is tailored for enthusiasts and gamers with high-performance systems that demand stable power delivery and extensive connectivity options. It’s perfect for users planning to use the latest graphics cards or multiple high-power components. In contrast, the be quiet! System Power 11 targets budget-conscious consumers who still require a reliable power supply for their mid-range setups. Its lower price and solid performance make it suitable for general use without the need for extreme power.
Which should you buy?
Choosing between the Gigabyte UD850GM and the be quiet! System Power 11 ultimately depends on your specific needs and budget. If you require a robust, high-capacity power supply with advanced features and superior efficiency, the Gigabyte UD850GM is the better option at £99.61. However, if you are looking for a dependable power supply at a more affordable price of £64.99, the be quiet! System Power 11 provides excellent value for mid-range systems. Consider your system requirements and budget carefully to make the best choice for your needs.
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