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Be Quiet! 850W Straight Power 12 PSU Fully Modular 80+ Platinum ATX 3.0

SKU Code: HOCSP-89429

Original price was: £168.12.Current price is: £159.85.

Be Quiet! 850W Straight Power 12 PSU Fully Modular 80+ Platinum ATX 3.0

SKU Code: HOCSP-89429

MPN:

BN337

  • 24-pin ATX 3.0
  • 850W Wattage
  • Fully-Modular
  • 80 PLUS Platinum

Original price was: £168.12.Current price is: £159.85.

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Product Description

Be Quiet! Straight Power 12 850W Platinum Efficiency Silent Mastery

Ultimate Power Efficiency for Demanding Builds

The Be Quiet! Straight Power 12 850W sets a new benchmark in power delivery with its 80 PLUS Platinum certification and support for ATX 3.0 standards. With efficiency peaking at an impressive 94%, it ensures minimal power loss and reduced heat output. This not only lowers electricity costs but also contributes to quieter, cooler operation—ideal for premium gaming setups and professional workstations that demand both performance and precision.

Prepared for the Future of PC Hardware

Built to fully comply with ATX 3.0 and PCIe 5.0 specifications, this PSU offers maximum versatility and forward compatibility. It comes equipped with both the high-capacity 12VHPWR connector for next-gen GPUs and multiple PCIe 6+2-pin connectors for current high-performance cards. Backed by a powerful single 12V rail, it confidently handles power excursions up to twice its rated wattage—perfect for modern CPUs and GPUs with sudden power spikes.

Whisper-Quiet Cooling with Premium Components

Featuring a virtually silent 135mm Silent Wings fan with fluid-dynamic bearing and a 6-pole motor, the Straight Power 12 delivers optimal cooling with minimal noise. The funnel-shaped air intake enhances airflow efficiency, and the wire-free internal design reduces resistance while improving cooling. High-quality Japanese 105°C capacitors further ensure long-term reliability, making this PSU a cornerstone for any high-end, quiet, and future-proof PC build.

Description Specification
Form Factor ATX
Series Be Quiet! Straight Power 12
Wattage 850 W
Modular Fully Modular
Compatibility ATX 3.0
EPS 12V v2.92
PCIe 5.0
Wattage Range 800 – 860W
Connectors 1 x P4+4 (CPU)
1 x P8 (CPU)
1 x 12VHPWR cables
1 x PCI-e 6+2-pin (GPU)
9 x SATA
2 x PATA
Rail Design One massive high-performance 12V-rail
AC Input AC 100-240 V
Fan Type 135mm Silent Wings Fan
Fan Bearing Fluid / Hydraulic Bearing
Noise dB(A) at 10% load: 7.5
dB(A) at 20% load: 7.5
dB(A) at 50% load: 7.7
dB(A) at 100% load: 22.1
Max Certification Platinum
Efficiency 80+ Platinum
230V, 2% load: 61.0%
230V, 10% load: 89.2%
230V, 20% load: 93.1%
230V, 50% load: 94.0%
230V, 100% load: 92.3%
MTBF >100,000 hours
Protection OTP (Over Temperature Protection)
OCP (Over Current Protection)
OPP (Over Power Protection)
SCP (Short Circuit Protection)
OVP (Over Voltage Protection)
UVP (Under Voltage Protection)
SIP (Surge & Inrush Protection)
Package Contents PSU
Screws
Cable ties
User manual
Weight / Dimensions 1.81 kg
(LxWxH) 160 x 150 x 86 mm
Package Weight 3.9000 kg
Warranty 10 Years
ATX 3.1 / 3.0 ATX 3.0

Other Options

Customer Reviews

4.3
46 reviews
23
15
8
0
0

46 reviews for Be Quiet! 850W Straight Power 12 PSU Fully Modular 80+ Platinum ATX 3.0

Clear filters
  1. Lindsay (verified owner)

    Decent component but came in basic packaging

  2. Leilani (verified owner)

    Installation was tricky for beginners

  3. Nya (verified owner)

    Gets the job done, nothing more

  4. Odie (verified owner)

    Everything works fine, but delivery could be faster

  5. Patsy (verified owner)

    Exactly what I needed for my gaming rig

  6. Ramon (verified owner)

    Very efficient and stays cool

  7. Neoma (verified owner)

    Expected more from this brand

  8. Lincoln (verified owner)

    Stable and reliable so far, time will tell

  9. Lauren (verified owner)

    Not perfect but definitely worth the price

  10. Nigel (verified owner)

    Fair price and great service

  11. Mike (verified owner)

    Massive improvement from my old component

  12. Mayra (verified owner)

    Really impressed with the durability

  13. Markus (verified owner)

    Came with everything needed to get started

  14. Randal (verified owner)

    Amazing value for money, my PC runs smoother than ever

  15. Randy (verified owner)

    Great customer support and fast dispatch

  16. Lucienne (verified owner)

    Perfect for gaming and multitasking

  17. Priscilla (verified owner)

    It’s working, but I’ll upgrade soon

  18. Lois (verified owner)

    Met my expectations but not blown away

  19. Raquel (verified owner)

    Exactly as described and works great

  20. Pasquale (verified owner)

    My FPS increased significantly after installation

  21. Lorena (verified owner)

    Fair quality, feels a bit outdated

  22. Percy (verified owner)

    Fan gets loud during gaming

  23. Louise (verified owner)

    Does the job well, no major complaints

  24. Margaux (verified owner)

    Top-notch performance and easy installation

  25. Lance (verified owner)

    Zero compatibility issues, great experience

  26. Marisol (verified owner)

    Happy overall, just had to replace a missing screw

  27. Napoleon (verified owner)

    Performs well, packaging could be better

  28. Nikita (verified owner)

    Works great but shipping took a bit longer than expected

  29. Morris (verified owner)

    Worked as expected, a bit bulky though

  30. Percival (verified owner)

    Reliable, powerful, and works as expected

  31. Monserrat (verified owner)

    Very stable even under heavy load

  32. Norwood (verified owner)

    Very satisfied, just a small scratch on arrival

  33. Max (verified owner)

    Helped speed up my PC noticeably

  34. Madilyn (verified owner)

    Good value but no included cables

  35. Leland (verified owner)

    Solid quality and very quiet in operation

  36. Melody (verified owner)

    Would definitely buy again from this store

  37. Morton (verified owner)

    Highly recommend for any PC build

  38. Laury (verified owner)

    Excellent packaging and genuine product

  39. Norene (verified owner)

    A must-have upgrade for any serious gamer

  40. Norval (verified owner)

    Worked after a few restarts

  41. Rachel (verified owner)

    Speed boost was immediately noticeable

  42. Moses (verified owner)

    Fair price and great service

  43. Nyla (verified owner)

    Very efficient and stays cool

  44. Leann (verified owner)

    Delivered ahead of time and well packed

  45. Merle (verified owner)

    Decent thermal performance, not the best

  46. Oral (verified owner)

    Installation was simple and quick

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  • 24-pin ATX 3.0
  • 850W Wattage
  • Fully-Modular
  • 80 PLUS Platinum
Description

Be Quiet! Straight Power 12 850W Platinum Efficiency Silent Mastery

Ultimate Power Efficiency for Demanding Builds

The Be Quiet! Straight Power 12 850W sets a new benchmark in power delivery with its 80 PLUS Platinum certification and support for ATX 3.0 standards. With efficiency peaking at an impressive 94%, it ensures minimal power loss and reduced heat output. This not only lowers electricity costs but also contributes to quieter, cooler operation—ideal for premium gaming setups and professional workstations that demand both performance and precision.

Prepared for the Future of PC Hardware

Built to fully comply with ATX 3.0 and PCIe 5.0 specifications, this PSU offers maximum versatility and forward compatibility. It comes equipped with both the high-capacity 12VHPWR connector for next-gen GPUs and multiple PCIe 6+2-pin connectors for current high-performance cards. Backed by a powerful single 12V rail, it confidently handles power excursions up to twice its rated wattage—perfect for modern CPUs and GPUs with sudden power spikes.

Whisper-Quiet Cooling with Premium Components

Featuring a virtually silent 135mm Silent Wings fan with fluid-dynamic bearing and a 6-pole motor, the Straight Power 12 delivers optimal cooling with minimal noise. The funnel-shaped air intake enhances airflow efficiency, and the wire-free internal design reduces resistance while improving cooling. High-quality Japanese 105°C capacitors further ensure long-term reliability, making this PSU a cornerstone for any high-end, quiet, and future-proof PC build.

Description Specification
Form Factor ATX
Series Be Quiet! Straight Power 12
Wattage 850 W
Modular Fully Modular
Compatibility ATX 3.0
EPS 12V v2.92
PCIe 5.0
Wattage Range 800 – 860W
Connectors 1 x P4+4 (CPU)
1 x P8 (CPU)
1 x 12VHPWR cables
1 x PCI-e 6+2-pin (GPU)
9 x SATA
2 x PATA
Rail Design One massive high-performance 12V-rail
AC Input AC 100-240 V
Fan Type 135mm Silent Wings Fan
Fan Bearing Fluid / Hydraulic Bearing
Noise dB(A) at 10% load: 7.5
dB(A) at 20% load: 7.5
dB(A) at 50% load: 7.7
dB(A) at 100% load: 22.1
Max Certification Platinum
Efficiency 80+ Platinum
230V, 2% load: 61.0%
230V, 10% load: 89.2%
230V, 20% load: 93.1%
230V, 50% load: 94.0%
230V, 100% load: 92.3%
MTBF >100,000 hours
Protection OTP (Over Temperature Protection)
OCP (Over Current Protection)
OPP (Over Power Protection)
SCP (Short Circuit Protection)
OVP (Over Voltage Protection)
UVP (Under Voltage Protection)
SIP (Surge & Inrush Protection)
Package Contents PSU
Screws
Cable ties
User manual
Weight / Dimensions 1.81 kg
(LxWxH) 160 x 150 x 86 mm
Package Weight 3.9000 kg
Warranty 10 Years
ATX 3.1 / 3.0 ATX 3.0
Reviews (25)
4.2
25 reviews
12
7
6
0
0

25 reviews for Be Quiet! 850W Straight Power 12 PSU Fully Modular 80+ Platinum ATX 3.0

Clear filters
  1. Lou (verified owner)

    Does the job well, no major complaints

  2. Patsy (verified owner)

    Amazing value for money, my PC runs smoother than ever

  3. Marie (verified owner)

    Happy with the product, minor noise under load

  4. Louisa (verified owner)

    Delivered ahead of time and well packed

  5. Larue (verified owner)

    Super fast delivery and the product works perfectly

  6. Maxime (verified owner)

    Very good quality but slightly pricey

  7. Natalie (verified owner)

    Reliable, powerful, and works as expected

  8. Merlin (verified owner)

    Fan gets loud during gaming

  9. Ozzy (verified owner)

    No major issues, just wish support was quicker

  10. Ramona (verified owner)

    Installation was tricky for beginners

  11. Lavada (verified owner)

    Fantastic price for this level of performance

  12. Lisandro (verified owner)

    Good value but no included cables

  13. Melvin (verified owner)

    It’s fine, just not worth the hype

  14. Pamela (verified owner)

    Solid quality and very quiet in operation

  15. Lionel (verified owner)

    Would definitely buy again from this store

  16. Pierre (verified owner)

    Upgraded my system and noticed the difference instantly

  17. Mariane (verified owner)

    Works flawlessly with my setup

  18. Noelia (verified owner)

    Strong build quality and smooth functionality

  19. Monroe (verified owner)

    Took a while to arrive, but it works

  20. Patrick (verified owner)

    Good investment for long-term performance

  21. Omari (verified owner)

    Fair price and great service

  22. Prudence (verified owner)

    Very stable even under heavy load

  23. Pansy (verified owner)

    Fits well in my case, tight clearance though

  24. Okey (verified owner)

    Decent component but came in basic packaging

  25. Manuela (verified owner)

    No major issues, but lacks polish

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