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be quiet! Pure Power 12 M BN343

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be quiet! Pure Power 12 M BN343
2023Pure80+ Gold10 year warranty
550 W
24+8 (4+4) pin
650 W
24+8+4 pin
750 W
24+8+8(4+4) pin
850 W
24+8+8(4+4) pin
1000 W
24+8+8(4+4) pin
1200 W
24+8+8(4+4) pin
Main
Power750 W
Form factorATX
Specs
PFCactive
Efficiency93 % / 50% load /
Cooling systemactive (fan)
Fan size120 mm
Fan bearingsliding
Certification80+ Gold
ATX12V version3.1
EPS12V version2.92
Power connectors
MB/CPU power supply24+8+8(4+4) pin
SATA5
MOLEX2
PCI-E 8pin (6+2)2
PCI-E 16pin1
Cable systemmodular
Cable length
MB550 mm
CPU600 mm
SATA650 mm
MOLEX800 mm
PCI-E500 mm
Max. power
+3.3V20 А
+5V20 А
+12V136 А
+12V232 А
-12V0.3 А
+5Vsb3 А
+12V750 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
Weight1.69 kg
Official Websitebequiet.com
Added to E-CatalogFebruary 2023
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!.
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BEQUIET Pure Power 12 M 750W 80+ Gold Fully Modular ATX 3.0 PSU BN343

BEQUIET Pure Power 12 M 750W PSU (BN343) Demand peak performance from your system with the BEQUIET Pure Power 12 M 750W powe... morer supply. Designed for discerning PC enthusiasts, gamers, and content creators, this fully modular ATX 3.0 and PCIe 5.0 compatible PSU delivers exceptional stability, whisper-quiet operation, and future-proof compatibility for high-end components. Experience the ultimate in power delivery and efficiency with a power supply built to last. Features 80 PLUS Gold certification for up to 92.6% efficiency, reducing energy consumption and heat generation. ATX 3.0 and PCIe 5.0 compliant, ensuring seamless compatibility with the latest high-end graphics cards and CPUs. Whisper-quiet 120mm be quiet! fan with rifle bearing technology for exceptional longevity and minimal noise. Advanced LLC technology for superior voltage regulation and stability. Fully modular cabling for optimized airflow and simplified system building. Includes one PCIe 5.0 12VHPWR (600W) and two PCIe 6+2 pin connectors for maximum GPU compatibility. Two strong 12V rails for handling demanding components and transient power surges. Backed by a comprehensive 10-year manufacturer's warranty. Specifications Brand: BEQUIET Model: Pure Power 12 M MPN: BN343 EAN: 4260052189481 Power Output: 750W Efficiency: 80 PLUS Gold (up to 92.6%) Form Factor: ATX Fan: 120mm be quiet! fan (rifle bearing) Modular Cables: Yes, Fully Modular Connectors: One PCIe 5.0 12VHPWR (600W), Two PCIe 6+2 pin, Multiple SATA and Molex connectors (specific counts vary, please refer to the manual). Warranty: 10 years Standards: ATX 3.0, PCIe 5.0 compliant
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be quiet! Pure Power 12 M power supply unit 750 W 20+4 pin ATX ATX Black BN343

Pure Power 12 M 750W is ATX 3.0 compliant and PCIe 5.0 compatible and offers peerless dependability with best... more-in-class features. Pure Power 12 M 750W offers the best combination of features with outstanding compatibility.     - 80 PLUS® Gold efficiency (up to 92.6%)  - 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 2 PCIe 6+2 connectors for high-end GPUs  ; - 10-year manufacturer’s warranty         80 PLUS® Gold Certified Very high operating efficiency Pure Power 12 M 750W is certified 80 PLUS Gold with an outstanding efficiency rating of up to 92.6%. The most compelling benefit: lower power consumption consequently lower costs and above all a cooler as well as quieter operation. Pure Power 12 M 750W 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 750W 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 powerful present systems.     The New Standard of Power For massive transient loads Pure Power 12 M offers 750W of continuous power with 2 independent 12V rails. Even if the graphics card demands excessive power for a short time: Pure Power 12 M 750W 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 750W 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 750W simplifies cable management and routing for a tidy-looking system. A smoother airflow results from the uncluttered layout of the system
Quzo.co.uk
Delivery: to United Kingdom
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£104.35
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be quiet! Pure Power 12 M power supply unit 750 W 20+4 pin ATX ATX Bla BN343

be quiet! Pure Power 12 M power supply unit 750 W 20+4 pin ATX ATX Black
itsupplies.uk
Delivery: to United Kingdom
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£108.50
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be quiet! Pure Power 12 M power supply unit 750 W 20+4 pin ATX ATX Bla BN343

be quiet! Pure Power 12 M power supply unit 750 W 20+4 pin ATX ATX Black
LaptopHub.uk
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£108.50
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be quiet! Pure Power 12 M power supply unit 750 W 20+4 pin ATX ATX Black BN343

80 PLUS® Gold efficiency (up to 92.6%). ATX 3.1 PSU with full support for PCIe 5.1 GPUs and GPUs with 6+2 pin connectors. Exc... moreeptionally 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 5.1 12V-2x6 600W and 2 PCIe 6+2 connectors for high-end GPUs. 10-year manufacturer’s warranty. EXCEPTIONAL QUIET, SUPERIOR FEATURES. Pure Power 12 M 750W is ATX 3.1 compliant and PCIe 5.1 compatible and offers peerless dependability with best-in-class features. Pure Power 12 M 750W offers the best combination of features with outstanding compatibility.. 80 PLUS® GOLD CERTIFIED. Very high operating efficiency. Pure Power 12 M 750W is certified 80 PLUS Gold with an outstanding efficiency rating of up to 92.6%. The most compelling benefit: lower power consumption, consequently lower costs, and above all a cooler as well as quieter operation. Pure Power 12 M 750W is always the correct choice for quiet systems and gaming PCs!. FUTURE-PROOF YOUR SYSTEM. Fulfills all ATX 3.1 specifications. Pure Power 12 M 750W is an ATX 3.1 PSU and comes with both native integration of the 12V-2x6 connector for next-generation PCIe 5.1 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 powerful present systems.. THE NEW STANDARD OF POWER. For massive transient loads. Pure Power 12 M offers 750W of continuous power with 2 independent 12V rails. Even if the graphics card demands excessive power for a short time: Pure Power 12 M 750W 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 750W 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 750W 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. 92.6%. 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). 20 A. Max output current
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Delivery: in United Kingdom
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£108.99
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5 more offer(s)
Series be quiet! Pure Power (reliability)Compare using chart →
be quiet! Pure Power 13 M BP027
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850 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 1 x 16 pin, SATA 6, Molex 2, ATX, modular, Efficiency 94 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 13 M BP026
from £99.19 
750 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 1 x 16 pin, SATA 6, Molex 2, ATX, modular, Efficiency 94 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 12 M BN344
from £109.25 
850 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 1 x 16 pin, SATA 6, Molex 2, ATX, modular, Efficiency 93 %, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 13 M BP028
from £129.63 
1000 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 1 x 16 pin, SATA 6, Molex 2, ATX, modular, Efficiency 94 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 12 BP003
from £74.40 
750 W, 24+8+8(4+4) pin, 3 x 6+2 pin, 1 x 16 pin, SATA 6, Molex 1, ATX, Efficiency 91 %, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 12 M BN345
from £131.23 
1000 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 1 x 16 pin, SATA 6, Molex 2, ATX, modular, Efficiency 93 %, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 13 M BP025
from £88.99 
650 W, 24+8+4 pin, 2 x 6+2 pin, 1 x 16 pin, SATA 5, Molex 2, ATX, modular, Efficiency 94 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 12 BP002
from £78.60 
650 W, 24+8+4 pin, 2 x 6+2 pin, 1 x 16 pin, SATA 5, Molex 1, ATX, Efficiency 91 %, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 12 BP004
from £99.99 
850 W, 24+8+8(4+4) pin, 3 x 6+2 pin, 1 x 16 pin, SATA 6, Molex 1, ATX, Efficiency 91 %, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 13 M BP024
from £74.16 
550 W, 24+8 (4+4) pin, 2 x 6+2 pin, 1 x 16 pin, SATA 5, Molex 2, ATX, modular, Efficiency 94 %, semi-passive СО, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 12 M BN342
from £90.98 
650 W, 24+8+4 pin, 2 x 6+2 pin, 1 x 16 pin, SATA 5, Molex 2, ATX, modular, Efficiency 93 %, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 12 M BN346
from £151.03 
1200 W, 24+8+8(4+4) pin, 4 x 6+2 pin, 1 x 16 pin, SATA 6, Molex 2, ATX, modular, Efficiency 93 %, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 12 BP005
from £106.67 
1000 W, 24+8+8(4+4) pin, 3 x 6+2 pin, 1 x 16 pin, SATA 6, Molex 1, ATX, Efficiency 91 %, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 12 M BN343
from £101.16 
750 W, 24+8+8(4+4) pin, 2 x 6+2 pin, 1 x 16 pin, SATA 5, Molex 2, ATX, modular, Efficiency 93 %, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 12 M BN341
from £77.23 
550 W, 24+8 (4+4) pin, 2 x 6+2 pin, 1 x 16 pin, SATA 5, Molex 2, ATX, modular, Efficiency 93 %, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 11 BN292
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400 W, 24+8 (4+4) pin, 2 x 6+2 pin, SATA 5, Molex 2, ATX, Efficiency 92 %, certificate 80+ Gold, warranty 5 years
be quiet! Pure Power 12 BP001
from £61.54 
550 W, 24+8 (4+4) pin, 2 x 6+2 pin, 1 x 16 pin, SATA 5, Molex 1, ATX, Efficiency 91 %, certificate 80+ Gold, warranty 10 years
be quiet! Pure Power 11 FM BN318
from £96.99 
650 W, 24+8+8(4+4) pin, 4 x 6+2 pin, SATA 9, Molex 2, ATX, modular, Efficiency 92 %, certificate 80+ Gold, warranty 5 years
be quiet! Pure Power 11 FM BN319
from £113.93 
750 W, 24+8+8(4+4) pin, 4 x 6+2 pin, SATA 9, Molex 2, ATX, modular, Efficiency 92 %, certificate 80+ Gold, warranty 5 years
be quiet! Pure Power 11 FM BN324
from £126.99 
850 W, 24+8+8(4+4) pin, 4 x 6+2 pin, SATA 10, Molex 2, ATX, modular, Efficiency 93 %, certificate 80+ Gold, warranty 5 years
Model overview based on user reviews  
The "be quiet! Pure Power 12 M" power supply unit is praised for its modular wiring system, silence, and reliability, making it a popular choice among users. It offers a long-term warranty and is noted for its quiet operation and efficient performance with up to 92.6% FCC. However, some users have experienced issues with stiff cables that are difficult to connect, particularly the 24-pin plug, which may be a concern for those with larger cases. Additionally, there was a report of a unit arriving with a broken seal, affecting the warranty. Despite these concerns, it is considered a good model for its price, especially for smaller builds, and is recommended for its silent operation and modular design.
Pros

Cons

User reviews 6
Write Review →
1
0
1
4
For your money - KING of silent blocks s 12VHPWR/80 Plus Gold/10 years
8 August 2023 
I recommend it as a good model!
Silence in the robot 93% FCC (up to 92.6% FCC), modular design, important, subtle components in the middle.
The next day, the screen is like a bi showing the speed of the PC at a given moment.
PHOTO-PR: use be quiet! BN343 few months
Comments 2
Discuss
 Show Original
Garniy choice for small buildings
25 December 2023 
I took a 650W for a system with R5 5600 + RTX 4060. Installed it without problems, except for the very tight fit of all the cables, especially the largest 24 pin (visible in the photo). I was pushing with all my strength, the board and the case were bending)) I was already thinking it might crack, went to a specialist, and he said, "Well, what do you expect, it's new," but a friend recently built a PC with a PSU from Gigabyte and all the cables plugged in easily. I saw reviews that some people didn't have enough cable length, but my case is mATX format, and I didn't experience this issue, maybe it's from users with ATX boards and consequently larger cases. Otherwise, I have no complaints about the PSU, it's been working for a little over 2 months without issues.
Long-term warranty
Quiet
Reliable
Modular
If you have a large case for full-sized ATX boards, the length of the native wires might not be sufficient. Be careful. The 24-pin plug inserts very tightly, but this might be a motherboard issue.
Sergіy: use be quiet! BN342 few months
Comments 1
Discuss
 Show Original
Fain life block
28 August 2025 
I wanted a reliable PSU, as a friend had a PSU without a certification with limited safety features. It burned out.

I was thinking of getting a Chieftec Polaris PPS-750FC, but was recommended to get be quiet! Pure Power 12 M BN343. I went with Be quiet. and I sleep peacefully :)
- quiet operation
- reliability
- modular system
- the wire is stiff, but still gives in. In addition, the installation is done once. Not critical
Shashic: use be quiet! BN343 few months
Discuss
 Show Original
3 out of 6 user review(s) shown
3 more user review(s)

be quiet! Pure Power 12 M configurations

Price for be quiet! Pure Power 12 M
be quiet! Pure Power 12 M BN341from £77.237 offers
be quiet! Pure Power 12 M BN342from £90.988 offers
be quiet! Pure Power 12 M BN343from £101.1610 offers
be quiet! Pure Power 12 M BN344from £109.258 offers
be quiet! Pure Power 12 M BN345from £131.233 offers
be quiet! Pure Power 12 M BN346from £151.034 offers

Supports ATX 3.0 and PCI-E 5.0

be quiet! Pure Power 12 M is a modern power supply that combines excellent performance, energy efficiency and functionality, making it an ideal choice for a variety of users. The model is 80 Plus Gold certified with an efficiency of up to 93%. Pure Power 12 M also supports the PCI-E 5.0 standard and includes a 12VHPWR connector, which allows you to connect GeForce RTX 4000 graphics cards with a power consumption of up to 600 W without the need for adapters.

10 years warranty

To develop the power supply, the company chose an affordable but high-quality HEC platform with LLC topology, half-bridge converter and DC-DC converters for secondary lines. According to the manufacturer, it provides stable voltage with minimal deviations (less than 2%) and a significant power reserve (+25% of the nominal). The device uses solid Teapo capacitors and high-quality German transistors. Despite the absence of Japanese capacitors, which are often found in 80+ Gold class PSUs, a 10-year warranty and a wide range of protective functions confirm the high reliability of the power supply, which can easily withstand several system upgrades.

Quiet fan and modular cables

All power cables in the model are modular, which allows you to disconnect unnecessary cables when assembling the system, simplifying the process and maintaining order in the case. The Pure Wings 2 fan with a diameter of 120 mm with PWM control automatically adjusts the operating speed to ensure an optimal level of acoustic comfort. Even at maximum load, the noise level does not exceed 26 dB, which makes be quiet! Pure Power 12 M an excellent choice for those who value silence.

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