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be quiet! Pure Power 12 M BN344

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be quiet! Pure Power 12 M BN344
Main
Power850 W
Form factorATX
Specs
PFCactive
Efficiency93 % / 50% load /
Cooling systemactive (fan)
Fan size120 mm
Fan bearingsliding
Certification80+ Gold
Cybenetics EfficiencyPlatinum
Cybenetics NoiseA -
ATX12V version3.1
EPS12V version2.92
Power connectors
MB/CPU power supply24+8+8(4+4) pin
SATA6
MOLEX2
PCI-E 8pin (6+2)4
PCI-E 16pin1
Cable systemmodular
Cable length
MB550 mm
CPU600 mm
SATA650 mm
MOLEX800 mm
PCI-E500 mm
Max. power
+3.3V22 А
+5V22 А
+12V140 А
+12V236 А
-12V0.3 А
+5Vsb3 А
+12V850 W
+3.3V +5V120 W
General
Over voltage protection (OVP)
Over power protection (OPP)
Short circuit protection (SCP)
ProtectionOTP, OCP, UVP, SIP
Noise level9 dB
Manufacturer's warranty10 years
Dimensions (HxWxD)86x150x160 mm
Weight1.85 kg
Official Websitebequiet.com
Added to E-Catalogfebruary 2023

Powerful, modern and relatively inexpensive by be quiet! computer power supply standard ATX 3.0. This factor guarantees the device’s ability to provide power to modern video cards with a 12VHPWR connector and peak power consumption of up to 600 W without any adapters. This PSU belongs to the middle price range and is part of the Pure Power line, the products of which are distinguished by high quality workmanship and extremely low noise levels.

It features a 120mm fan that automatically changes speed based on device temperature, and airflow-optimized fan blades that reduce turbulence for quiet operation with efficient cooling. According to the manufacturer, at a peak load of 100%, the maximum noise level does not exceed 26 dB. The circuitry of the device uses advanced LLC topology and DC-DC converters of secondary channels, and the power supply itself is equipped with two +12V lines.

Heat-resistant capacitors, alas, are not Japanese, which may scare off particularly demanding users. At the same time, the manufacturer is so confident in the quality of its products that it positions this PSU as a power source that is undergoing at least one global component upgrade. Confidence is backed by a 10-year warranty. 93% efficiency is within the 80+ Gold standard and can easily withstand short-term loads up to 1000 W along the main +12V line, without noticeable voltage drops below the specified level. All wiring uses a modular connection system, so unused cable noodles can be disconnected and stored out of sight. Plus, be quiet! Pure Power 12 M is equipped with all kinds of protections, including overheating, overcurrent, short circuit, overvoltage and undervoltage.

The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog be quiet! 2025 - new arrivals, bestsellers, and the most relevant models be quiet!.
How to choose a power supply for a PCBasics of choosing a reliable and balanced power supply for your home, office and gaming computer

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be quiet! Pure Power 12 M power supply unit 850 W 20+4 pin ATX ATX Bla BN344

CoolingFan diameter12 cmNumber of fans1 fan(s)Fan locationTopCooling typeActivePerformanceOn/off switchYesPower supply unit (... morePSU) form factorATXNoise level (quiet mode, 50%)9.5 dBNoise level (silent mode,
itsupplies.uk
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£90.42

be quiet! be quiet! Pure Power 12 M power supply unit 850 W 20+4 pin ATX ATX Black BN344

80 PLUS® Gold efficiency (up to 93.2%) ATX 3.0 PSU with full support for PCIe 5.0 GPUs and GPUs with 6+2 pin connectors Excep... moretionally silent 120mm be quiet! fan Advanced stability and voltage regulation thanks to LLC technology 2 strong 12V-rails Modular cables for maximum build flexibility One PCIe 5.0 12VHPWR 600W and 4 PCIe 6+2 connectors for overclocked high-end GPUs 10-year manufacturer’s warranty EXCEPTIONAL QUIET, SUPERIOR FEATURESPure Power 12 M 850W is ATX 3.0 compliant and PCIe 5.0 compatible and offers peerless dependability with best-in-class features. Pure Power 12 M 850W offers the best combination of features with outstanding compatibility.80 PLUS® GOLD CERTIFIEDVery high operating efficiencyPure Power 12 M 850W is certified 80 PLUS Gold with an outstanding efficiency rating of up to 93.2%. The most compelling benefit: lower power consumption, consequently lower costs, and above all a cooler as well as quieter operation. Pure Power 12 M 850W is always the correct choice for quiet systems and gaming PCs!FUTURE-PROOF YOUR SYSTEMFulfills all ATX 3.0 specificationsPure Power 12 M 850W is an ATX 3.0 PSU and comes with both native integration of the 12VHPWR connector for next-generation PCIe 5.0 graphics cards, and PCIe 6+2-pin connectors for support of current-gen GPUs. This makes the PSU extremely versatile and the perfect choice for present high-end systems and the ones to come.THE NEW STANDARD OF POWERFor massive transient loadsPure Power 12 M offers 850W of continuous power with 2 independent 12V rails. Even if the graphics card demands excessive power for a short time: Pure Power 12 M 850W handles power excursions up to double its rated power with ease. This ensures reliable operation with the next generation of processors and graphics cards.UNPRECEDENTED SILENT OPERATIONAchieved with a silence-optimized be quiet! fanThe exceptionally silent 120mm be quiet! fan is temperature-controlled to strike the best balance between effective cooling and quietness. Airflow-optimized fan blades reduce turbulence, enabling best-in-classquiet functionality. HIGH-CLASS TECHNOLOGIESRock-solid stabilityWith its LLC topology Pure Power 12 M 850W provides a best-in-class voltage regulation and efficiency. That makes it perfect for building or upgrading very quiet systems as well as gaming and media creation PCs.MODULAR CABLESUtmost convenience and compatibilityThanks to their modularity, all unnecessary cables in the system are left out. Pure Power 12 M 850W simplifies cable management and routing for a tidy-looking system. A smoother airflow results from the uncluttered layout of the system, which means lower noise and temperatures inside the case. Power Power protection features Over current, Over power, Over voltage, Overheating, Short circuit Efficiency 93.2% Power Good signal delay range 100 - 150 ms Max output current (+5Vsb) 3 A Max output current (-12V) 0.3 A Max output current (+5V) 22 A Max output current (+12V2) 36 A Max output current
Backtotheoffice.co.uk
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£108.99

be quiet! Pure Power 12 M power supply unit 850 W 20+4 pin ATX ATX Black BN344CLR

Pure Power 12 M 850W is ATX 3.0 compliant and PCIe 5.0 compatible and offers peerless dependability with best... more-in-class features. Pure Power 12 M 850W offers the best combination of features with outstanding compatibility.   - 80 PLUS® Gold efficiency (up to 93.2%)  - ATX 3.0 PSU with full support for PCIe 5.0 GPUs and GPUs with 6+2 pin connectors - Exceptionally silent 120mm be quiet! fan - Advanced stability and voltage regulation thanks to LLC technology - 2 strong 12V-rails - Modular cables for maximum build flexibility - One PCIe 5.0 12VHPWR 600W and 4 PCIe 6+2 connectors for overclocked high-end GPUs  ; - 10-year manufacturer’s warranty         80 PLUS® Gold Certified Very high operating efficiency Pure Power 12 M 850W is certified 80 PLUS Gold with an outstanding efficiency rating of up to 93.2%. The most compelling benefit: lower power consumption consequently lower costs and above all a cooler as well as quieter operation. Pure Power 12 M 850W is always the correct choice for quiet systems and gaming PCs!     Future-Proof Your System Fulfills all ATX 3.0 specifications Pure Power 12 M 850W is an ATX 3.0 PSU and comes with both native integration of the 12VHPWR connector for next-generation PCIe 5.0 graphics cards and PCIe 6+2-pin connectors for support of current-gen GPUs. This makes the PSU extremely versatile and the perfect choice for present high-end systems and the ones to come.     The New Standard of Power For massive transient loads Pure Power 12 M offers 850W of continuous power with 2 independent 12V rails. Even if the graphics card demands excessive power for a short time: Pure Power 12 M 850W handles power excursions up to double its rated power with ease. This ensures reliable operation with the next generation of processors and graphics cards.     Unprecedented Silent Operation Achieved with a silence-optimized be quiet! fan The exceptionally silent 120mm be quiet! fan is temperature-controlled to strike the best balance between effective cooling and quietness. Airflow-optimized fan blades reduce turbulence enabling best-in-class quiet functionality.      High-Class Technologies Rock-solid stability With its LLC topology Pure Power 12 M 850W provides a best-in-class voltage regulation and efficiency. That makes it perfect for building or upgrading very quiet systems as well as gaming and media creation PCs.     Modular Cables Utmost convenience and compatibility Thanks to their modularity all unnecessary cables in the system are left out. Pure Power 12 M 850W simplifies cable management and routing for a tidy-looking system. A smoother airflow results from the uncluttered
Quzo.co.uk
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£109.97

be quiet! Pure Power 12 M 850 Watt PCIe 5.0 80+ Gold Fully Modular PSU

Scan.co.uk
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£109.99

be quiet! Pure Power 12 M power supply unit 850 W 20+4 pin ATX ATX Bla BN344

be quiet! Pure Power 12 M power supply unit 850 W 20+4 pin ATX ATX Black
ComputersDeal.com
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£108.50

be quiet! Pure Power 12 M power supply unit 850 W 20+4 pin ATX ATX Black BN344

Pure Power 12 M 850W is ATX 3.0 compliant and PCIe 5.0 compatible and offers peerless dependability with best... more-in-class features. Pure Power 12 M 850W offers the best combination of features with outstanding compatibility.   - 80 PLUS® Gold efficiency (up to 93.2%)  - ATX 3.0 PSU with full support for PCIe 5.0 GPUs and GPUs with 6+2 pin connectors - Exceptionally silent 120mm be quiet! fan - Advanced stability and voltage regulation thanks to LLC technology - 2 strong 12V-rails - Modular cables for maximum build flexibility - One PCIe 5.0 12VHPWR 600W and 4 PCIe 6+2 connectors for overclocked high-end GPUs  ; - 10-year manufacturer’s warranty         80 PLUS® Gold Certified Very high operating efficiency Pure Power 12 M 850W is certified 80 PLUS Gold with an outstanding efficiency rating of up to 93.2%. The most compelling benefit: lower power consumption consequently lower costs and above all a cooler as well as quieter operation. Pure Power 12 M 850W is always the correct choice for quiet systems and gaming PCs!     Future-Proof Your System Fulfills all ATX 3.0 specifications Pure Power 12 M 850W is an ATX 3.0 PSU and comes with both native integration of the 12VHPWR connector for next-generation PCIe 5.0 graphics cards and PCIe 6+2-pin connectors for support of current-gen GPUs. This makes the PSU extremely versatile and the perfect choice for present high-end systems and the ones to come.     The New Standard of Power For massive transient loads Pure Power 12 M offers 850W of continuous power with 2 independent 12V rails. Even if the graphics card demands excessive power for a short time: Pure Power 12 M 850W handles power excursions up to double its rated power with ease. This ensures reliable operation with the next generation of processors and graphics cards.     Unprecedented Silent Operation Achieved with a silence-optimized be quiet! fan The exceptionally silent 120mm be quiet! fan is temperature-controlled to strike the best balance between effective cooling and quietness. Airflow-optimized fan blades reduce turbulence enabling best-in-class quiet functionality.      High-Class Technologies Rock-solid stability With its LLC topology Pure Power 12 M 850W provides a best-in-class voltage regulation and efficiency. That makes it perfect for building or upgrading very quiet systems as well as gaming and media creation PCs.     Modular Cables Utmost convenience and compatibility Thanks to their modularity all unnecessary cables in the system are left out. Pure Power 12 M 850W simplifies cable management and routing for a tidy-looking system. A smoother airflow results from the uncluttered
Quzo.co.uk
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£122.56

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