NZXT C850 SFX Gold - 850W SFX ATX 3.1 Power Supply - 80 Plus Gold - Cybenetics P vs be quiet! System Power 11 750W Power Supply

Overview of the Products

In this article, we compare the NZXT C850 SFX Gold and the be quiet! System Power 11 750W power supplies. The NZXT C850 is priced at £129.98, while the be quiet! System Power 11 is significantly more affordable at £64.99. Despite the price difference, both products cater to different needs in the power supply market, making it essential to explore their features and capabilities.

Power Output and Efficiency

The NZXT C850 delivers a robust 850W power output, ensuring ample power for high-performance systems, particularly those with demanding graphics cards. It boasts an 80 PLUS Gold efficiency rating, which guarantees high efficiency and lower heat output. On the other hand, the be quiet! System Power 11 provides a slightly lower output at 750W, yet it still accommodates current and next-generation GPUs via its native 12V-2x6 connector. It carries an 80 PLUS Bronze certification, with an efficiency rating of up to 90.0%. While both supplies offer reliable power, the NZXT C850 edges ahead in terms of maximum power and efficiency rating.

Form Factor and Design

The NZXT C850 uses an SFX form factor, optimised for compact builds, making it an excellent choice for small form factor (SFF) cases. This design maximises space efficiency while delivering full-power capabilities. In contrast, the be quiet! System Power 11 adopts a standard ATX form factor. While this design is versatile and compatible with most cases, it may not fit into smaller setups. Thus, if space is a premium in your build, the NZXT C850 is the superior option.

Cooling Solutions

Cooling performance is essential for maintaining system stability, especially under heavy load. The NZXT C850 features a 92 mm fluid dynamic bearing (FDB) fan, designed for efficiency and quiet operation, including a Zero RPM mode for silent performance during low loads. In comparison, the be quiet! System Power 11 is equipped with a temperature-controlled 120 mm fan, renowned for its low noise operation. While both fans are designed to minimise noise, the NZXT C850’s FDB fan may offer slightly more advanced cooling technology, benefiting users who prioritise silence.

Compatibility with Modern Components

Both power supplies are designed with modern components in mind. The NZXT C850 is ATX 3.1 certified, ensuring compatibility with current high-performance graphics cards. It includes a 600W 12V-2x6 connector, providing dependable power delivery. The be quiet! System Power 11 also supports next-generation graphics cards with its native 12V-2x6 connector and traditional PCIe 6+2-pin connectors. While both products are well-suited for modern builds, the NZXT C850’s higher power output may provide an advantage for more demanding setups.

Reliability and Stability

Reliability is crucial for maintaining system performance. The NZXT C850 ensures uninterrupted operation with low ripple noise, tight voltage regulation, and long hold-up time, which protect components and maintain stability. Conversely, the be quiet! System Power 11 is also designed for stability, capable of handling power excursions up to double its rated output with safety protections against overcurrents, undervoltages, and short circuits. While both units provide a solid foundation for stable performance, the NZXT C850 offers additional features that enhance its reliability.

Noise Levels and Operation

Noise levels can significantly impact user experience, particularly in quiet environments. The NZXT C850 is designed for silent operation, featuring a Zero RPM mode that keeps the fan off under low loads, contributing to a quieter system. The be quiet! System Power 11, as the name suggests, is built for quiet operation as well, but it may not achieve the same level of silence as the NZXT C850 under all conditions. If noise is a critical factor for your setup, the NZXT C850 may prove to be the better choice.

Price Point and Value

The NZXT C850 is priced at £129.98, reflecting its premium features, higher power output, and advanced cooling solutions. In contrast, the be quiet! System Power 11 is an attractive option at £64.99, providing solid performance and decent efficiency at a lower cost. While the NZXT C850 offers enhanced capabilities for high-performance systems, the be quiet! System Power 11 presents excellent value for budget-conscious users. Your choice will depend on your specific needs and budget.

Which should you buy?

Choosing between the NZXT C850 SFX Gold and the be quiet! System Power 11 ultimately depends on your requirements. If you need a high-output, compact power supply that operates quietly and efficiently, the NZXT C850 is the clear winner. However, if you are looking for a cost-effective solution that provides reliable performance for a standard build, the be quiet! System Power 11 is a solid choice. Your decision should reflect your budget, space constraints, and performance needs.