Skip to: | | - A great place to buy computers, computer parts, electronics, software, accessories, and DVDs online. With great prices, fast shipping, and top-rated customer service - Newegg shopping upgraded ™

If you are reading this message, Please click this link to reload this page.(Do not use your browser's "Refresh" button). Please email us if you're running the latest version of your browser and you still see this message. - Computer Parts, Laptops, Electronics, HDTVs, Digital Cameras and More!

be quiet! Dark Power Pro 11 1200W ATX 12V 80 Plus Platinum Modular Power Supply – Silent Wings 3 Fans

Ships from United States.

Sold by be quiet! a-seller and Shipped by Newegg

Purchases from these Sellers are generally covered under our Newegg Marketplace Guarantee.
Marketplace Seller
  • ATX12V / EPS12V
  • Modular
  • 80 PLUS PLATINUM Certified
  • 90 - 264 V 47 - 63 Hz
  • 1200W
  • ATX 12V v2.3 / EPS 12V v2.92
  • 90 - 264 V

  • Overview
  • Specs
  • Warranty & Returns
  • Reviews

be quiet! Dark Power Pro 11 | 1200W - BN255

It is a fact of the modern world that high technology requires constant refinement and unending improvement — and that is even truer for those who would be leaders. Dark Power Pro power supplies are renowned as the world's quietest and most efficient high-performance PSUs. The Dark Power Pro 11 1200W model takes that a step further with a power conversion topology that delivers 80PLUS® Platinum performance, add to that an unparalleled array of enhancements that augment this unit's compatibility, convenience of use, reliability, and safety, and the result is the most technologically-advanced power supply be quiet! has ever built.

  • 80PLUS® Platinum certification and up to 94% power conversion efficiency
  • Virtually inaudible operation thanks to a broad array of optimizations, including the use of a be quiet! SilentWings® 3 135mm fan
  • SilentWings® 3 fan features an advanced fan frame, an airflow-optimized fan blade, fluid-dynamic bearing with copper core and a high-quality 6-pole motor for less vibration
  • The funnel-shaped fan opening of the PSU case is significant big and allows high airflow intake
  • 1200 Watts of continuous power provide intensive power reserves for demanding computing applications
  • Overclocking key allows switchover between quadruple independent 12V-rail mode and high-performance single-rail operation
  • NVIDIA SLI Ready and AMD CrossFireX certifications allow you to build powerful Multi-GPU systems with confidence
  • Cable management with extra long cable reach simplifies component installation and reduces annoying clutter, increasing airflow and improving cooling in even the largest PC cases
  • Product conception, design and quality control in Germany


be quiet! Dark Power Pro 11 | 1200W - BN255

  • Advanced, high-resolution gaming and multimedia systems
  • Overclocked systems
  • Multi-GPU workstations for 3D graphics, photo editing, video editing
  • Any application that requires high power with superior quietness


be quiet! Dark Power Pro 11 | 1200W - BN255

Energy Efficiency
  • 80PLUS® Platinum certification with up to 94% efficiency
  • Saving power means saving money, but it also mean less waste heat, less cooling required, and overall quieter operation
  • Standby drain less than 0.10Watts
  • Meets Energy Star 6.0 guidelines
  • Fulfills the ErP 2014 guidelines
  • Zero Load design supports Intel's Deep Power Down C6 and C7 (Haswell) modes
be quiet! Dark Power Pro 11 | 1200W - BN255
Virtually Inaudible Operation
  • Installed SilentWings® 3 135mm fan includes a wide array of electronic and mechanical optimizations for best-of-class airflow with very low noise production, including:
    • Unique airflow-optimized fan blade design reduces noise-generating fan turbulence
    • Advanced fluid-dynamic bearing with copper core provides for greatly reduced operating noise and super-long life
    • 6-pole fan motor smoothes operation even at very low speeds
    • High quality IC motor controller reduces electrical noise
  • PSU case has a large funnel-shaped fan opening that facilitates high airflow intake
  • SilentWings® 3 fan is decoupled from the PSU body with special rubberized ring mount, reducing transmission of vibration and noise
  • Dual-layer PSU housing with rubberized sleeve isolates your chassis from PSU noise and vibration, further enhancing silence
  • Optimized PSU airflow generates superior cooling at lower fan speeds, reducing turbulence and allowing even quieter operation
  • Variable fan speed is optimally governed to strike the best balance between proper cooling and deep quietness
  • Up to four case fans can be connected to, and regulated by the PSU, thus reducing overall system noise even further
be quiet! Dark Power Pro 11 | 1200W - BN255
  • Advanced full bridge, LLC, Synchronous Rectifier (SR) and DC-to-DC power conversion circuitry design supports unmatched signal stability and unbeatable power efficiency
  • Overclocking key allows you to choose between multi-rail operation with four independent 12V-rails and high-performance single-rail operation
  • Premiere-quality Japanese capacitors rated to 105°C for maximum reliability and operating life
  • Increased output of 12V capacitors to minimize feedback sounds of graphics cards
  • Top protection for components against over-currents, over- and under-voltages, short circuits, overheating, overloads and voltage surges on input side
  • Long service life up to 150,000 hours
  • Full performance during 24/7 operation
be quiet! Dark Power Pro 11 | 1200W - BN255
Maximum Compatibility and Convenience
  • Supports the latest Intel® and AMD™ processors
  • Compatible with ATX12V 2.4 and EPS12V 2.92 standards
  • Professional modular cable management system with removable cable bundles simplifies component installation, reduces annoying clutter, increases airflow and allows for improved cooling
  • Cable management with 2x P8 connector for better voltage stability for the CPU
  • System supports up to 33 connectors for massive system builds
  • Connectors are compatible with older components as well as those still on the drawing board
  • Sleeved cable lengths up to 120cm are perfect for large PC cases and allow for improved cooling in any size case
  • Individual P4 and P8 plugs support all common mainboard types
  • Nine PCIe connectors for powerful multi-GPU configurations (NVIDIA SLI and AMD CrossFireX) up to Quad-GPU
  • Clearly labeled plugs and clever accessories promote simple installation

What's in the Box

be quiet! Dark Power Pro 11 | 1200W - BN255

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details
Ownership: more than 1 year
Verified Owner
1/ 5
Very poor customer support 6/8/2018 11:25:41 AM

Pros: Any it has are far outweighed by the poor customer support.

Cons: Main ATX connect field after like a year in use

Bequiet takes their customers for granted and makes no effort to provide customer support worthy of the premium price this PSU has.

Overall Review: The Mian ATX cable failed so I filled out the RAM form on Be quiet's website. They sent me back basically a form replay saying they would send another cable if I gave them my address. Since the main ATX cable is the one cable on the PSU that is non removable this obviously was a form reply for a bad cable and not a real response to my RMA request. So I explained again what cable was bad and that it was not removable and asked if they actually read my email. They never replied to that email so I called them.

No apology was given for not replying only a claim that my email was "missed" instead of ignored which I have trouble believing due to the critical tone my email took. But either way it is totally unacceptable and warrants at the very least an apology. There wasn't even an apology for the PUS being defective. Than I asked if they would pay for the shipping to send the psu to them since I was treated so poorly. They said no. When I asked to speak to a supervisor he said "this is how this is going to be handled." He Would not even elevate the call and did not care that I had received such poor customer service and had no desire to do right by me at all. They clearly have the attitude that "we have your money now so too bad for you." My local gas station treats it's customers better and values them more. Which considering Be quiet is supposed to be a premium band and the product in question was their top of the line most expensive PSU is unforgivable. I'm am tempted to not send the PSU in at all and just buy a different brand. I'm that disgusted with the service I received.

I also have a Dark Base pro 900 case and some Silent Wings fans. But now I regret spending so much on Bequiet products and will never buy another Be quiet product again. I suggest you don't either. They don't deserve your money. Not one penny.

1 out of 4 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
I expected more from this power supply and I got it 1/2/2018 3:38:08 AM

Pros: Very quite operation
Easy to insert cables, plenty of cables sent and then some

Cons: I've only had it running a couple weeks so there has been no cons.

Overall Review: I would recommend this to anyone that can afford it.
Good power supplies are not cheap, but I believe you get what you pay for on these parts.

Did you find this review helpful?
Verified Owner
1/ 5
1/25/2017 5:04:28 PM

Pros: Was great for 2 months...

Cons: After 2 months power supply would click but would not start up. The description claims that the power supply comes with a 5 year warranty, but this requires that you send the unit to Germany and pay shipping....

Overall Review: Waste of time and money. Companys should not be able to list a warranty as a product feature in country's where they cannot offer service in a reasonable manner.

8 out of 8 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Very positively impressed... 12/23/2016 9:35:45 AM

Pros: Got this to power an Antminer R4, and works like a charm. Amazingly quiet (have this running in my office 24/4, w/o any noise issues), and even had enough PCI-E power cables to connect the miner. _Very_ happy so far.

Cons: Nothing - I really like it.

Overall Review: Only thing I could think of adding to the package was a switch to power it on even when no ATX motherboard is attached to it (ie, if you only need the PCI-E power cables, not the ATX connector) ... but that's not a big problem: a bent paper clip at the right location does the trick, too ... :-)

0 out of 1 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Impressed 12/12/2016 7:31:48 AM

Pros: Oozes quality. I simply like everything about it (reference the product overview and specifications).

Cons: Cannot think of any cons.

Overall Review: Keep in mind this review is given early imo. Purchased 11-16-16 and installed 12-05-16. But if nothing changes, I am sold on be quiet! products and will be a new, loyal customer.

Did you find this review helpful?
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Great 12/7/2016 12:37:43 PM

Pros: great design
has fan connections

Cons: power cable to cpu is not modular

Overall Review: I had to replace my power supply because I found out there wasn't enough power... Well, this guy does the trick and does it very well. First off, I love that it's 4 rails of power for knowing my components are safer during heavy workloads ( since I use my computer for video editing). Also, you can change it to 1 rail of power if you wanted to. Overall, it's powerful and quiet. Just awesome.

Did you find this review helpful?
Ownership: 1 month to 1 year
Verified Owner
4/ 5
The best power supply I've ever encountered! 11/21/2016 1:10:48 AM

Pros: - Very powerful
- Extremely quiet
- Modular (mostly)

Cons: - ATX power connector is not modular. (When I added a cable mod extension to make it look better in my build, it took up a lot of space. Seems unnecessary, especially for a power supply of this caliber. Should be modular like other high-end power supplies.)

1 out of 1 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Beautiful and Quiet 4/14/2016 1:52:06 PM

Pros: Awesome appearance
Great packaging
Great Cables for any configuration
Super Quiet operation
Great power delivery
Heavy solid metal case

Cons: None really, the price is fair compared to other similar power supplies

Overall Review: I have been building systems for 20 years and this is one of the best looking Power Supplies I have ever seen.

2 out of 2 people found this review helpful. Did you?
ICON Loading...
Selected Items
  • Add to Wish List Found on 2 wish lists
Are you an E-Blast Insider?
Subscribe Newegg e-Blast
Shop without retyping payment details. Secure shopping made faster.
Check out with PayPal.
Price Available at Checkout
Why can’t we show you details of this product?

Some manufacturers place restrictions on how details of their products may be communicated.

If the Adobe Reader does not appear when you click on a link for a PDF file, you can download Adobe Reader from the Adobe web site.