be quiet! Power Zone 2 850W ATX 3.1 PSU | 80 Plus and Cybenetics Platinum Efficiency | Zero RPM Low-Noise Power Supply | PCIe 5.1 Ready | Black | BP007US
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AI Verdict
This 850W ATX 3.1 PSU with 80 Plus and Cybenetics Platinum efficiency is for builders prioritizing silent operation and PCIe 5.1 readiness.
This 850W ATX 3.1 power supply is a strong contender if you prioritize quiet operation during low loads and need native PCIe 5.1 support with its 90° angled connector. Its Platinum efficiency is a plus for power savings. However, the use of Elite capacitors and reported coil whine for some users means it's not a universal recommendation.
If absolute silence under all loads and top-tier component quality are critical, look for PSUs with Japanese capacitors throughout and A+ tier ratings on reputable PSU tier lists.
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Pros
- Achieves up to 94.1% energy efficiency with 80 PLUS Platinum and Cybenetics Platinum certifications, reducing power consumption and heat.
- Features semi-passive zero-RPM cooling, keeping the 140mm Pure Wings 3 fan off during low loads for near-silent operation.
- Includes a native 12V-2x6 connector and a 90° angled 12V-2x6 connector for PCIe 5.1 graphics cards, simplifying cable management.
- ATX 3.1 compliant, supporting power excursions up to double its rated 850W for next-gen components.
- Backed by a 10-year manufacturer's warranty.
Cons
- Some users report coil whine, even in light usage scenarios.
- Uses budget-oriented Elite capacitors, which might raise longevity concerns despite the 10-year warranty.
- Voltage ripple filtering is adequate but does not achieve the sub-30 mV 12V performance of premium units.
- Rated B+ on PSU tier lists, while some similarly priced ATX 3.1 competitors achieve A+ ratings.
Dimension Scores
The PSU boasts 80 PLUS Platinum and Cybenetics Platinum certifications, achieving up to 94.1% efficiency, and handles power excursions up to double its 850W rated power.
It features semi-passive zero-RPM cooling with a 140mm Pure Wings 3 fan, ensuring near-silent operation at low loads, though some users report coil whine under load.
Built on an FSP platform with adequate voltage ripple filtering, but the inclusion of budget-tier Elite capacitors prevents a higher score despite the 10-year warranty.
As a fully modular unit, it allows for clean cable routing, and the included 90° angled 12V-2x6 connector specifically aids in managing modern GPU power cables.
Best For
- PC builds focused on minimal noise during light tasks and web browsing.
- Gaming systems with high-end PCIe 5.1 graphics cards needing native 12V-2x6 connectors.
- Users who want a power supply with a long warranty period.
- Systems requiring 850W continuous power with robust excursion handling.
Not Recommended For
- Enthusiasts demanding top-tier internal components and absolute lowest voltage ripple.
- Users sensitive to potential coil whine under load.
- Budget-conscious builders who can find A-tier PSUs at a similar or lower price point.
Watch Out For
- Coil whine has been reported by users, occurring even in light scenarios at 1080p 60fps.
- The fan has a 2-5 minute post-ventilation cooldown period, which might be noticeable after heavy loads.
- Internal components include budget-tier Elite capacitors, which could be a concern for long-term reliability for some users, despite the 10-year warranty.
Full Specifications
| ASIN | B0DVJNMCR1 |
| Brand | be quiet! |
| Wattage | 850 watts |
| Model Name | Power Zone 850W |
| Form Factor | ATX |
| Item Weight | 7.22 pounds |
| Manufacturer | be quiet! |
| Connector Type | ATX, PCIe |
| Cooling Method | Air |
| Output Wattage | 850 Watts |
| Item model number | BP007US |
| Compatible Devices | ATX Motherboard, PCIe 5.1 Graphics Card, High-end Processor |
| Package Dimensions | 12.91 x 10.2 x 4.13 inches |
| Maximum Input Voltage | 240 Volts (AC) |
| Minimum Input Voltage | 100 Volts (AC) |
What Buyers Say
The most surprising feedback is the recurring mention of coil whine, which some users experience even during light use, directly contradicting the 'silent' branding. While many appreciate the Platinum efficiency and the semi-passive fan for quiet operation when it works as intended, the coil whine issue is a significant drawback for a product from a brand named 'be quiet!'. The ATX 3.1 and PCIe 5.1 readiness, especially the angled 12V-2x6 connector, is consistently highlighted as a forward-thinking feature.
“Man, this thing is quiet when the fan's off, but the coil whine is driving me nuts, especially after paying for 'be quiet!'.”
Common Praise
- Fan stays off during low power usage, making the PC very quiet for browsing.
- The 90-degree 12V-2x6 connector is super helpful for cable routing in smaller cases.
- It's ready for new graphics cards with the ATX 3.1 and PCIe 5.1 connectors.
- The Platinum efficiency rating actually saves a bit on the electricity bill.
- The 10-year warranty gives peace of mind, even with the internal component choices.
Common Complaints
- My unit has a noticeable coil whine, even when just watching YouTube.
- The fan sometimes clicks when it turns off or on, which is annoying.
- For the price, I expected higher-end capacitors throughout, not just Elite ones.
- It's rated B+ on PSU tier lists, and I saw A+ options for similar money.
Ownership Tips
- The fan's 2-5 minute cooldown period after heavy use means it keeps spinning for a bit even after you've shut down a game.
- The 90° angled 12V-2x6 cable is a game-changer for case aesthetics and not bending the cable too much.
- Even though it's semi-passive, the fan does kick in eventually, and it's not completely inaudible then, but still pretty low volume.
- The modular cables are stiff, making routing a bit of a challenge in compact builds.
Frequently Asked Questions
Does this PSU support the latest graphics cards?
Yes, it's ATX 3.1 compliant and includes a native 12V-2x6 connector for PCIe 5.1 graphics cards, plus three PCIe 6+2-pin connectors for current-gen GPUs.
Is this power supply truly silent?
It features semi-passive zero-RPM cooling, so the 140mm fan remains off under low loads, making it near-silent during desktop use. The fan only activates when more demanding operations require it.
What is the efficiency rating of this power supply?
It holds both 80 PLUS Platinum and Cybenetics Platinum certifications, indicating an energy efficiency rating of up to 94.1%.
What kind of warranty does it come with?
The be quiet! Power Zone 2 850W comes with a 10-year manufacturer's warranty.
Does it have modular cables?
Yes, it is a fully modular power supply, allowing you to connect only the cables you need for a cleaner build.
Buying Guide
When you're looking at a power supply, you're essentially buying the heart of your PC. You need enough wattage for all your components, especially your graphics card and CPU. Efficiency ratings like 80 PLUS Platinum tell you how much power is wasted as heat, so higher efficiency means less heat and potentially lower electricity bills. Also, look for ATX 3.1 and PCIe 5.1 readiness if you're building with or planning to upgrade to the newest graphics cards, as they have specific power connectors.
wattage (850W)
This is the total power your PSU can deliver. Think of it like the horsepower of an engine; if your car (PC) needs 800 horsepower to run all its systems, an 850W PSU gives you just enough headroom without being overkill. Too little, and your PC won't run stably; too much, and you're paying for unused capacity.
80 PLUS Platinum and Cybenetics Platinum Efficiency
This measures how much power the PSU converts into usable electricity for your PC versus how much is lost as heat. Platinum means it's converting at least 90% of the power efficiently, like a fuel-efficient car that wastes less gas. This translates to less heat inside your case and potentially lower energy bills.
ATX 3.1 and PCIe 5.1 Ready
This is about future-proofing. ATX 3.1 is the latest standard for power supplies, and PCIe 5.1 is for the newest, most power-hungry graphics cards. It means the PSU has the right internal design and the specific 12V-2x6 connector to handle these components without needing adapters, which can be a fire hazard with older PSUs.
Semi-passive Zero-RPM Cooling
This feature means the fan in the PSU doesn't spin at all when your PC isn't doing much, like browsing the web. It's like your car's engine turning off at a stoplight to save fuel and reduce noise. The fan only kicks in when your PC starts working harder, keeping your system quieter during light use.
Alternatives
If you need top-tier internal components and guaranteed silence without coil whine, search for PSUs with all Japanese capacitors and an A+ rating on reputable PSU tier lists. If you're on a tighter budget but still need ATX 3.1, look for 80 PLUS Gold rated units from known brands.
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