be quiet! POWER ZONE 850W PSU
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About This Item
- 850 W continuous power with 80 PLUS Platinum efficiency
- Active cooling with 140 mm Pure Wings 3 fan
- ATX 3.1 standard with native 12V-2×6 PCIe 5.1 connector
- Fully-modular cabling design for clean builds
- Semi-passive zero-RPM mode for silent operation
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be quiet! POWER ZONE 2 850W | Platinum Efficiency, Semi-Passive Cooling
The be quiet! POWER ZONE 2 850W power supply unit delivers exceptional efficiency and near-silent operation for demanding gaming and content creation systems. With 80 PLUS Platinum certification and semi-passive zero-RPM cooling, this ATX 3.1 PSU handles high-performance components while maintaining whisper-quiet operation under typical loads.
Slim Specs Table
| Metric | Spec. |
|---|---|
| Total Power | 850 W |
| Efficiency | 80 PLUS Platinum (92.3%) |
| Cooling Type | Semi-passive with 140mm fan |
| ATX Version | 3.1 |
| Hold Time | 21.1 ms |
Semi-Passive Zero-RPM Cooling for Silent Gaming
The POWER ZONE 2 850W features intelligent semi-passive cooling that completely stops the Pure Wings 3 140mm fan under low to medium loads. This zero-RPM mode eliminates fan noise during everyday computing, gaming, or media consumption. When system demands increase, the large-diameter fan activates smoothly after a brief 2-5 minute cooldown period to prevent frequent starts and stops. Combined with the rifle-bearing technology, this cooling system delivers exceptional reliability while maintaining near-silent operation across all usage scenarios.
Future-Proof Design with ATX 3.1 and PCIe 5.1 Support
Built for tomorrow’s hardware, this PSU includes native 12V-2×6 connector support for next-generation PCIe 5.1 graphics cards. The package includes a 90° angled 12V-2×6 connector, ensuring compatibility with upcoming high-power GPUs while maintaining clean cable management. Three PCIe 6+2-pin connectors provide support for current-generation graphics cards, making this unit versatile enough for both today’s systems and future upgrades. The ATX 3.1 compliance guarantees stable power delivery for the latest processors and graphics cards with their demanding transient loads.
Exceptional Power Delivery and Protection
With 850W continuous power and a massive 920W peak capability, this single-rail PSU handles extreme power demands with ease. The LLC topology ensures best-in-class voltage regulation and efficiency, while comprehensive protection features safeguard your components: over current, over power, over voltage, overheating, short circuit, surge & inrush, and under voltage protection. The 21.1ms hold time maintains stable power during brief outages, and the 100,000-hour MTBF rating ensures long-term reliability for your high-end system.
Fully Modular Cabling for Clean Builds
The fully-modular design allows you to connect only the cables you need, reducing clutter and improving airflow within your case. Cable lengths are optimized for modern builds: 60cm motherboard cables, 70cm CPU cables, and 60cm PCIe cables. The seven SATA power connectors and various peripheral Molex connections accommodate multiple drives and accessories. All cable designations are printed directly on the PSU’s case for easy identification during installation and future upgrades.
Box contents
- be quiet! POWER ZONE 2 850W power supply unit
- 90° angled 12V-2×6 connector
- Fully modular cables
- Mounting screws
- Cable ties
- User manual (German, English, Spanish, French, Polish, Russian, Ukrainian)
Check before you buy
- Confirm your case has sufficient space for ATX PSU dimensions (150 x 160 x 86mm)
- Verify your graphics card’s power requirements match the available PCIe connectors
- Check that your motherboard’s EPS connector location aligns with the 70cm CPU power cable
- Ensure your system’s total power draw stays within the 850W continuous rating
Frequently Asked Questions
Q: What makes this PSU suitable for gaming systems?
A: The semi-passive cooling eliminates fan noise during gaming sessions, while 80 PLUS Platinum efficiency reduces power consumption and heat output.
Q: Can this power supply handle PCIe 5.0 graphics cards?
A: Yes, it includes a native 12V-2×6 connector and comes with a 90° angled adapter specifically for PCIe 5.1 graphics cards.
Q: Is the fan completely silent during low loads?
A: Yes, the Pure Wings 3 fan stops completely under low to medium loads, providing true zero-RPM silent operation.
Q: What protection features are included?
A: Comprehensive protection includes over current, over power, over voltage, overheating, short circuit, surge & inrush, and under voltage protection.
Q: How many SATA devices can I connect?
A: The PSU provides seven SATA power connectors for multiple storage drives and optical devices.
The Consultant’s verdict & warranty
The be quiet! POWER ZONE 2 850W represents an excellent choice for gamers and content creators seeking whisper-quiet operation without compromising on power delivery or future compatibility. Its semi-passive cooling, ATX 3.1 compliance, and PCIe 5.1 support make it ideal for high-performance systems where silence matters. Covered by the standard Manufacturer Warranty.
| Cooling | |
|---|---|
| Fan diameter | 14 cm |
| Number of fans | 1 fan(s) |
| Cooling type | Active |
| Performance | |
| On/off switch | Yes |
| Power supply unit (PSU) form factor | ATX |
| 80 PLUS certification | 80 PLUS Platinum |
| Purpose | PC |
| ATX version | 3.1 |
| EPS version | 2.92 |
| Noise level | 24.9 dB |
| Mean time between failures (MTBF) | 100000 h |
| Bearing technology | Rifle |
| Design | |
| 80 PLUS certification | 80 PLUS Platinum |
| Product colour | Black |
| Fan diameter | 14 cm |
| On/off switch | Yes |
| Number of fans | 1 fan(s) |
| Cooling type | Active |
| Power | |
| Total power | 850 W |
| Maximum input current (@220V) | 5 A |
| Peak power | 920 W |
| AC input voltage | 100 - 240 V |
| AC input frequency | 50/60 Hz |
| Power factor | 0.98 |
| Maximum input current (@110V) | 10 A |
| Combined power (+3.3V) | 120 W |
| Combined power (+12V) | 849.6 W |
| Combined power (+5V) | 120 W |
| Combined power (-12V) | 6 W |
| Combined power (+5Vsb) | 15 W |
| Max output current (+3.3V) | 20 A |
| Max output current (+12V) | 70.8 A |
| Max output current (+5V) | 20 A |
| Max output current (-12V) | 0.5 A |
| Max output current (+5Vsb) | 3 A |
| Power protection features | Over current, Over power, Over voltage, Overheating, Short circuit, Surge & inrush, Under voltage |
| Hold time | 21.1 ms |
| Efficiency | 92.3% |
| Number of +12V rail(s) | 1 |
| Ports & interfaces | |
| Motherboard power cable length | 60 cm |
| SATA power cable length | 550,700,850,1000 mm |
| Peripheral (Molex) power cable length | 1000 mm |
| PCI Express power cable length | 60 cm |
| CPU power cable length | 70 cm |
| Motherboard power connector | 20+4 pin ATX |
| Number of SATA power connectors | 7 |
| Peripheral (Molex) power connectors (4-pin) | 1 |
| EPS power connector (8-pin) | Yes |
| PCI Express power connectors (6+2 pin) | 3 |
| CPU P4 connector (4-pin) | 1 |
| CPU power connector (4+4 pin) | Yes |
| Cabling type | Fully-Modular |
| PCI Express power connectors (16-pin) | 1 |
| Operational conditions | |
| Operating temperature (T-T) | 0 - 40 °C |
| Storage temperature (T-T) | -40 - 70 °C |
| Operating relative humidity (H-H) | 0 - 85% |
| Storage relative humidity (H-H) | 0 - 95% |
| Technical details | |
| Shipping (inner) case width | 28.2 cm |
| Shipping (inner) case length | 65.1 cm |
| Shipping (inner) case height | 34.6 cm |
| Products per shipping (inner) case | 6 pc(s) |
| Sustainability certificates | ENERGY STAR, ErP, Triman |
| Compliance certificates | BSMI, CB, CCC, CE, Federal Communications Commission (FCC), RCM, RoHS, TÜV mark, UKCA, WEEE |
| Certificates | |
| Waste Electrical and Electronic Equipment (WEEE) compliance | Yes |
| Compliance certificates | BSMI, CB, CCC, CE, Federal Communications Commission (FCC), RCM, RoHS, TÜV mark, UKCA, WEEE |
| 80 PLUS certification | 80 PLUS Platinum |
| Certification | |
| Waste Electrical and Electronic Equipment (WEEE) compliance | Yes |
| Weight & dimensions | |
| Width | 150 mm |
| Depth | 160 mm |
| Height | 86 mm |
| Packaging data | |
| Screws included | Yes |
| Cable ties included | Yes |
| Package depth | 328 mm |
| Package width | 248 mm |
| Package height | 102 mm |
| Package type | Box |
| Package weight | 3.21 kg |
| Manual | Yes |
| Manual languages | German, English, Spanish, French, Polish, Russian, Ukrainian |
| Packaging content | |
| Screws included | Yes |
| Cable ties included | Yes |
| Manual | Yes |
| Logistics data | |
| Shipping (inner) case width | 28.2 cm |
| Shipping (inner) case length | 65.1 cm |
| Shipping (inner) case height | 34.6 cm |
| Products per shipping (inner) case | 6 pc(s) |
| Shipping (inner) case gross weight | 19.3 kg |
| Other features | |
| Screws included | Yes |
| Cable ties included | Yes |
| Manual | Yes |
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