be quiet! PURE POWER 12 850W PSU
£97.10 inc VAT
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About This Item
- 850W ATX 3.1 power supply with PCIe 5.1 compatibility
- Active cooling with 12 cm fan and rifle bearing technology
- 80 PLUS Gold certified for up to 90.5% efficiency
- Comprehensive protection including over current, over voltage, and short circuit
- Non-modular cabling with included AC cables and cable ties
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be quiet! PURE POWER 12 850W | Gold Efficiency & Silent Performance
The be quiet! PURE POWER 12 850W power supply unit 20+4 pin ATX ATX Black delivers 850 watts of reliable, quiet power for high-performance PC builds. With ATX 3.1 compliance and PCIe 5.1 compatibility, this unit is built for modern gaming rigs and creative workstations that demand both stability and silence.
Key Specifications
| Metric | Spec |
|---|---|
| Efficiency | 80 PLUS Gold (90.5%) |
| Fan | 120mm Rifle bearing, 25.1 dB |
| MTBF | 100,000 hours |
| Cabling | Non-modular |
| Warranty | 10 years |
Built for Quiet, Reliable Power
The be quiet! PURE POWER 12 850W features a 120mm fan with Rifle bearing technology, ensuring whisper-quiet operation even under load. With a noise level of just 25.1 dB, this PSU is ideal for noise-sensitive environments like home offices or media centres. The 80 PLUS Gold certification guarantees high efficiency, reducing heat and energy waste while maintaining stable voltage output.
Future-Proofed for Modern Components
This power supply is ATX 3.1 compliant and PCIe 5.1 compatible, making it ready for the latest graphics cards and motherboards. It includes a dedicated PCIe 5.1 cable alongside three PCIe 6+2 connectors, offering flexibility for multi-GPU setups. The single +12V rail delivers 850W of combined power, ensuring consistent performance for demanding components.
Comprehensive Protection & Longevity
The PURE POWER 12 850W is equipped with multiple protection features including over current, over power, over voltage, overheating, short circuit, surge & inrush protection, and under voltage safeguards. With a Mean Time Between Failures (MTBF) of 100,000 hours, this PSU is engineered for long-term reliability in both gaming and professional environments.
Box Contents
- be quiet! PURE POWER 12 850W power supply unit
- PCIe 5.1 cable
- Three PCIe 6+2 cables
- Motherboard 20+4 pin ATX cable
- CPU 4+4 pin cable
- Six SATA power cables
- One peripheral Molex cable
- AC power cable
- Cable ties
- Mounting screws
Check before you buy
- Confirm your case supports ATX form factor (86mm x 160mm x 150mm)
- Verify your GPU requires PCIe 5.1 or 6+2 pin connectors
- Check total system power draw is within 850W capacity
- Ensure your location’s voltage (100-240V) is supported
Frequently Asked Questions
Q: Is this power supply compatible with PCIe 5.0 graphics cards?
A: Yes, it includes both PCIe 5.1 and PCIe 6+2 cables for full compatibility.
Q: Can I use this PSU in a small form factor case?
A: The ATX dimensions may be too large for most SFF cases; check your case specs first.
Q: Does it come with all necessary cables for a gaming PC?
A: Yes, it includes motherboard, CPU, GPU, SATA, and peripheral cables.
Q: What is the noise level under load?
A: The fan operates at 25.1 dB, remaining quiet even during intensive tasks.
Q: Is the warranty valid in the UK?
A: Yes, it includes UKCA certification and a 10-year manufacturer warranty.
The Consultant’s Verdict & Warranty
The be quiet! PURE POWER 12 850W is an excellent choice for UK gamers and professionals seeking a quiet, efficient, and future-ready power supply. Its 80 PLUS Gold efficiency, comprehensive protection features, and ATX 3.1 compliance make it suitable for high-end builds. Covered by the standard Manufacturer Warranty.
| Cooling | |
|---|---|
| Fan diameter | 12 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 Gold |
| Purpose | PC |
| ATX version | 3.1 |
| EPS version | 2.92 |
| Noise level | 25.1 dB |
| Mean time between failures (MTBF) | 100000 h |
| Bearing technology | Rifle |
| Design | |
| 80 PLUS certification | 80 PLUS Gold |
| Product colour | Black |
| Fan diameter | 12 cm |
| On/off switch | Yes |
| Number of fans | 1 fan(s) |
| Cooling type | Active |
| Power | |
| Total power | 850 W |
| Maximum input current (@220V) | 6 A |
| Peak power | 900 W |
| AC input voltage | 100 - 240 V |
| AC input frequency | 50/60 Hz |
| Power factor | 0.98 |
| Power Factor Correction (PFC) type | Active |
| Maximum input current (@110V) | 12 A |
| Combined power (+3.3V) | 120 W |
| Combined power (+12V) | 850 W |
| Combined power (+5V) | 120 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5Vsb) | 15 W |
| Max output current (+3.3V) | 22 A |
| Max output current (+12V1) | 70.9 A |
| Max output current (+5V) | 22 A |
| Max output current (-12V) | 0.3 A |
| Max output current (+5Vsb) | 3 A |
| Power protection features | Over current, Over power, Over voltage, Overheating, Short circuit, Surge & inrush protection (SIP), Under voltage |
| Hold time | 17.34 ms |
| Efficiency | 90.5% |
| Number of +12V rail(s) | 1 |
| Ports & interfaces | |
| Motherboard power cable length | 55 cm |
| SATA power cable length | 500,650,800,950 mm |
| Peripheral (Molex) power cable length | 800 mm |
| PCI Express power cable length | 60 cm |
| CPU power cable length | 60 cm |
| Motherboard power connector | 20+4 pin ATX |
| Number of SATA power connectors | 6 |
| Peripheral (Molex) power connectors (4-pin) | 1 |
| PCI Express power connectors (6+2 pin) | 3 |
| CPU power connector (4+4 pin) | Yes |
| Cabling type | Non-Modular |
| PCI Express power connectors (12-pin) | 1 |
| Operational conditions | |
| Operating temperature (T-T) | 0 - 40 °C |
| Storage temperature (T-T) | -20 - 70 °C |
| Operating relative humidity (H-H) | 0 - 90% |
| Storage relative humidity (H-H) | 0 - 95% |
| Technical details | |
| Shipping (inner) case width | 24 cm |
| Shipping (inner) case net weight | 13.4 kg |
| Shipping (inner) case length | 56 cm |
| Shipping (inner) case height | 34 cm |
| Products per shipping (inner) case | 4 pc(s) |
| Sustainability certificates | ENERGY STAR, ErP, Triman |
| Warranty period | 10 year(s) |
| Compliance certificates | CB, CE, Federal Communications Commission (FCC), RoHS, UKCA, WEEE, cTUVus |
| Packaging content | |
| Cables included | AC |
| Cable tie(s) included | Yes |
| Screws included | Yes |
| Weight & dimensions | |
| Width | 86 mm |
| Depth | 160 mm |
| Height | 150 mm |
| Weight | 2.7 kg |
| Packaging data | |
| Cables included | AC |
| Screws included | Yes |
| Package depth | 320 mm |
| Package width | 133 mm |
| Package height | 210 mm |
| Package weight | 3.1 kg |
| Certificates | |
| 80 PLUS certification | 80 PLUS Gold |
| Logistics data | |
| Shipping (inner) case width | 24 cm |
| Shipping (inner) case net weight | 13.4 kg |
| Shipping (inner) case length | 56 cm |
| Shipping (inner) case height | 34 cm |
| Products per shipping (inner) case | 4 pc(s) |
| Other features | |
| Screws included | Yes |
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