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be quiet! Power Zone 2 1000W ATX 3.1 PSU | 80 Plus vs Cooler Master V850 SFX Gold 850W Fully Modular

Updated August 2026 — be quiet! Power Zone 2 1000W ATX 3.1 PSU | 80 Plus wins on cooling and noise level, Cooler Master V850 SFX Gold 850W Fully Modular wins on modularity.

The be quiet! Power Zone 2 offers higher wattage and better efficiency, making it ideal for demanding systems, while the Cooler Master V850 SFX Gold is a compact and cost-effective choice for smaller builds.

Why be quiet! Power Zone 2 1000W ATX 3.1 PSU | 80 Plus is better

Higher Wattage

Power Zone 2 provides 1000W compared to 850W of V850 SFX Gold.

Better Efficiency

Power Zone 2 has 80 PLUS Platinum certification vs Gold for V850 SFX Gold.

Noise Reduction

Power Zone 2 features a zero-RPM fan mode for quieter operation.

Why Cooler Master V850 SFX Gold 850W Fully Modular is better

Compact Size

V850 SFX Gold is designed for smaller ITX cases.

Lower Price

V850 SFX Gold is priced at $153.25, making it more budget-friendly.

Fully Modular

V850 SFX Gold offers fully modular cables for better cable management.

Overall score

be quiet! Power Zone 2 1000W ATX 3.1 PSU | 80 Plus
88
Cooler Master V850 SFX Gold 850W Fully Modular
84

Specifications

Specbe quiet! Power Zone 2 1000W ATX 3.1 PSU | 80 PlusCooler Master V850 SFX Gold 850W Fully Modular
Certification80 PLUS Platinum80 PLUS Gold
Fan Size140mm92mm
Connector Type12V-2x612VHPWR
Cooling TypeZero-RPMFDB
WarrantyN/A10 Years

Dimension comparison

be quiet! Power Zone 2 1000W ATX 3.1 PSU | 80 PlusCooler Master V850 SFX Gold 850W Fully Modular

Overview of Power Supplies

When comparing the be quiet! Power Zone 2 1000W and the Cooler Master V850 SFX Gold 850W, it's clear that both power supplies cater to different needs while offering impressive features. The Power Zone 2 comes with a higher wattage rating at 1000W, making it suitable for power-hungry systems. In contrast, the V850 SFX Gold offers a compact design with 850W, ideal for smaller builds. The price difference is also notable, with the Power Zone 2 retailing at $159.90 and the V850 SFX Gold at $153.25, making the latter about 4% cheaper.

Efficiency Ratings

The be quiet! Power Zone 2 boasts an 80 PLUS Platinum certification, achieving an energy efficiency rating of up to 94%. This high efficiency translates to lower power consumption and a cooler, quieter operation, which can be particularly beneficial for high-performance systems. On the other hand, the Cooler Master V850 SFX Gold is 80 PLUS Gold certified, delivering around 90% efficiency. While both power supplies are efficient, the Power Zone 2's Platinum certification gives it a noteworthy edge in terms of energy savings.

Cooling Solutions

In terms of cooling, the Power Zone 2 features a large Pure Wings 3 140mm fan designed for semi-passive operation. This means that under low load, the fan turns off completely, reducing noise levels significantly. The Cooler Master V850 SFX Gold, however, uses a 92mm Fluid Dynamic Bearing (FDB) fan that provides efficient cooling with a self-lubricating design. While both fans are designed for low noise, the be quiet! Power Zone 2's zero-RPM feature could appeal more to users prioritizing silence during lighter loads.

Modular Design

Both power supplies offer modular designs, which help reduce cable clutter and improve airflow within the case. The Cooler Master V850 SFX Gold is fully modular, allowing users to connect only the cables they need, which is particularly advantageous in smaller cases. The be quiet! Power Zone 2 does not specify if it is fully modular but does indicate that it comes with a 90° angled 12V-2x6 connector, enhancing cable management for next-gen PCIe 5.1 graphics cards. This slight difference may influence choice based on personal build preferences.

Build Quality and Components

The build quality of both power supplies is impressive, with the Cooler Master V850 SFX Gold utilizing high-quality 100% Japanese capacitors, which enhance efficiency and reduce ripple noise. The be quiet! Power Zone 2 does not specify its capacitor quality, but it emphasizes high-class technologies, including LLC topology for better voltage regulation. Users who prioritize top-notch components may find the Cooler Master slightly more appealing due to its focus on Japanese capacitors.

Compatibility and Future-Proofing

Looking at compatibility, the Power Zone 2 is designed with future-proofing in mind, featuring a native 12V-2x6 connector for PCIe 5.1 graphics cards. This makes it an excellent choice for users looking to invest in high-end systems that require the latest power connections. The Cooler Master V850 SFX Gold also supports PCIe 5.1 with a 90° connector, but its lower wattage may make it less suited for extremely demanding setups. Therefore, gamers and creators planning for future upgrades might lean towards the Power Zone 2.

Price Comparison

When considering price, the be quiet! Power Zone 2 is priced at $159.90, while the Cooler Master V850 SFX Gold comes in at $153.25. This makes the Cooler Master about 4% cheaper, which can be significant for budget-conscious consumers. However, the Power Zone 2’s higher wattage and Platinum efficiency may justify the extra investment for users with more demanding power needs.

Which should you buy?

Deciding between the be quiet! Power Zone 2 and the Cooler Master V850 SFX Gold ultimately depends on your specific needs. If you require a high-wattage supply for a power-intensive system and value noise reduction features, the Power Zone 2 is the superior choice despite its higher price. Conversely, if you're looking for a compact, efficient power supply for a mid-range build with a slightly lower price point, the Cooler Master V850 SFX Gold is an excellent option. Both power supplies hold their own in the competitive market, but your choice should align with your build's requirements and budget.