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be quiet! Straight Power 11 Platinum 850W Quiet Performance Power Supply | Fully Modular | BN643

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Condition: Used - Very Good
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Style: 850W Platinum


Features

  • 80 PLUS Platinum efficiency (up to 94%)
  • Virtually inaudible Silent Wings 3 135mm fan
  • Funnel-shaped fan opening of the PSU case for high airflow intake
  • Wire-free inside the PSU on the DC side for enhanced cooling and longevity
  • Modular cables for maximum build flexibility

Description

be quiet! Straight Power 11 Platinum 850W raises the bar for systems that demand virtually inaudible operation and outstanding efficiency ▪ 80 PLUS Platinum certification with an outstanding efficiency of up to 94% ▪ Virtually inaudible operation thanks to a Silent Wings 3 135mm fan ▪ Big funnel-shaped fan opening of the PSU case for high airflow intake ▪ Wire-free on the DC side inside the PSU for enhanced cooling and longevity ▪ Modular cables for maximum build flexibility ▪ Advanced stability and voltage regulation thanks to LLC SR and DC-to-DC ▪ Four high-performance 12V rails ▪ Powerful multi-GPU support with four PCI-Express connectors ▪ Japanese 105°C-rated capacitors ensure stability and reliability ▪ Power signal stability unmatched in its class ▪ ErP and Energy Star 7 0 ready ▪ 5-year manufacturer’s ▪ Product conception design and quality control in Germany

Model Name: straight power 11


Brand: be quiet!


Compatible Devices: Personal Computer


Connector Type: PCI Express


Output Wattage: 850 Watts


Wattage: 850 watts


Cooling Method: Air


Item Dimensions LxWxH: 13 x 9.75 x 4 inches


Power Supply Design: Full Modular


Fan Count: 1


Brand: ‎be quiet!


Series: ‎straight power 11


Item model number: ‎BN643


Item Weight: ‎7.15 pounds


Product Dimensions: ‎13 x 9.75 x 4 inches


Item Dimensions LxWxH: ‎13 x 9.75 x 4 inches


Color: ‎Black


Manufacturer: ‎be quiet


Date First Available: ‎March 14, 2020


Frequently asked questions

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View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Quiet and stable
Style: 1200W Platinum ATX3.0
I've had this power supply for about 2 weeks now and so far so good, its stable and quiet. The atx 3.0 cable really tidies up the installation with only one cable going to the gpu. I've ran many games with no issues. I cant hear the power supply at all and the price is great. Would recommend as this is my first be quiet! product I've purchased. ... show more
Reviewed in the United States on February 7, 2024 by Paul M
    • Works as intended
Style: 1200W Platinum ATX3.0
Great powersupply for the price. Love the platinum rating, quiet fan, and beautiful cables.
Reviewed in the United States on March 10, 2024 by Brandon
    • Power supply lives up to its namesake
Style: 1500W Platinum ATX3.0
This was my first be quiet! fan purchase, and I am using it in my system to power an Intel i9-14900k and RTX4090 without issue. Runs silently. Modularity is great for minimizing cable mess. Cables are high-quality and sleeved. Included 12VHPWR works nicely to deliver required power to the graphics card. Overall the PSU feels very premium and I highly recommend. ... show more
Reviewed in the United States on January 16, 2024 by Matt
    • Quality, quiet!
Style: 1200W Platinum ATX3.0
It screams quality! Plenty of cabling options to power even the most demanding of computers. I came from a seasonic 660w platinum power supply on my old setup. I wanted to future proof, so upgraded to this atx 3.0 power supply.
Reviewed in the United States on March 9, 2024 by Nate
    • Quality product
Style: 1200W Platinum ATX3.0
Good build quality for any price point. Solid. Hefty 6+ lbs. Very quiet, reminiscent of Noctua. Well thought-out internal layout and design, which aids cooling for a given fan RPM, noise level, or output power. At low power, I doubt the fan is even necessary; I suspect they spin it at the minimum RPM just to let customers know that it's working! ... show more
Reviewed in the United States on February 25, 2024 by Jeff
    • German Engineering!
Style: 1200W Platinum ATX3.0
I purchased the 1200w straight power from BeQuiet. Ya know what, it sure is quiet! The build quality is excellent. The fan is also of the highest quality and design, love that its 135mm, too. If you are looking for a high end power supply at a reasonable price and need 1200 watts (and it runs at 94% efficiency!), this might very well be the answer to your problem :) Im a happy camper. ... show more
Reviewed in the United States on January 20, 2024 by KenDEugene
    • Worked well for a year!
Style: 1000W Platinum
I didn't write a review when I first purchased this power supply nor when this power supply failed but I decided it was time to do so now. I purchased this power supply around Sep 2021 as part of several other items needed to rebuild my desktop. It installed fairly easily and it did come with plenty of connector cables. While it was in use the loudest parts of my computer were the cooling fans (still are). When it failed almost 11 months later. Unfortunately, I couldn't wait for the whole return/test/fail/replace scenario to play out and purchased another beQuiet power supply a day later (I had to get the 11 Platinum 1200w since it was the only one available for next day delivery). I finally got around to mailing off the broken supply in April 2023. I was notified April 21 that the facility had received my item. It is now May 2nd, 2023 and my replacement power supply was delivered today. I am pleased with the fairly quick turn around .. I just wish it was more like a broken cell phone .. they ship you the replacement FIRST and if you fail to send the broken item back they charge you for it. If I can find someone who wants to buy a new Straight Power 11 Platinum 1000W power supply I can offset some of my costs, since I don't expect the one in my computer to die (in over 20 years of building my computers I have only had 2 power supplies fail on me .. I have replaced many for bigger/better/newer reasons). ... show more
Reviewed in the United States on May 2, 2023 by Brent2u
    • Just like the name it's WHISPER QUIET!
Style: 1200W Platinum ATX3.0
Well made with plenty of power cables.
Reviewed in the United States on March 17, 2024 by Brewer

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