Search  for anything...

be quiet! Straight Power 11 Platinum 650W, BN641, Fully Modular, Power Supply

  • Based on 305 reviews
Condition: New
Checking for product changes
$134.90 Why this price?

Buy Now, Pay Later


As low as $22.48 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, Nov 29
Order within 3 hours and 47 minutes
Available payment plans shown during checkout

Size: 650W


Features

  • 80 PLUS Platinum efficiency (up to 93,7%)
  • 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

Size:650W be quiet! Straight Power 11 Platinum 650W raises the bar for systems that demand virtually inaudible operation and outstanding efficiency. 80 PLUS Platinum certification with an outstanding efficiency of up to 93,7% 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 warranty Product conception, design and quality control in Germany


Brand: Be quiet!


Item model number: BN641


Item Weight: 7.3 pounds


Product Dimensions: 13 x 9.75 x 4 inches


Item Dimensions LxWxH: 13 x 9.75 x 4 inches


Manufacturer: be quiet


Date First Available: March 14, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Nov 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Fantastic power supply.
Size: 550W
I've been building PCs for 20+ years, and this is one of the nicest power supplies I've ever seen. It's solid, extremely quiet, and fully modular (so you only use the cables you need). The design and build quality are just excellent. It's in an HTPC that is on 24/7, so I'll update this review if there are ever any reliability problems. ... show more
Reviewed in the United States on November 5, 2020 by Jon B

  • Best-priced 1000W Platinum-rated PSU I could find
Size: 1000W
I bought the Dark Power Pro 12 1500W for a mining rig that has been working beautifully for the last few weeks running 24/7 under 900W load, running cool and quiet! This led me to purchase an upgrade for my home PC, and I found this available for MSRP with next day shipping (I admit I got lucky). The quality of these things are awesome, I don’t even install custom cable extensions thanks to the sleeved cables. This PSU is now powering a i9-9900K OC which can draw 160+W and an RTX 3080 FTW3 which can chug 450W all by itself. I had an 850W GAMEMAX 80+ Gold to power these before and if I turned on ray-tracing for Warzone, my PC would crash. After upgrading to this 1000W by BeQuiet, running 3 separate PCIE power lines from the PSU to the GPU, I’m happy to report there has been zero crashes! I cannot hear the PSU fan going over my system fans at all, either. Highly recommend these power supplies! ... show more
Reviewed in the United States on May 24, 2021 by TechMonster_92

  • Very quiet PSU
Size: 750W
First off, while it's a very quiet PSU, it's by no means SILENT so please don't think you won't hear anything. That being said, however, you really won't hear the PSU itself as I'm sure you CPU fan and case fans are louder and will overtake the PSU's fans anyways. I bought this Platinum rating one because it's for my HTPC and that sucker is on 24/7 so the more efficient a PSU is, the less power is wasted (lower power bill! woohoo!). ... show more
Reviewed in the United States on November 25, 2020 by JZ

  • Good PSU, I just wish it came with better cables
Size: 750W
This review is specifically for Straight Power 11 Platinum 750W, BN642 I am making a NAS, and this was listed as having 11 SATA power connectors. It does, but you can't use all of them. The PSU allows you to connect just 3 SATA power cables. They provide you with 4. They are in 1x4, 1x3, 2x2x2. So that is 1 cable with 4 SATA, 1 cable with 3 SATA, and two cables with 2 SATA and 2 MOLEX. So the max number of drives you can connect to this is 9, unless you use a third party cable (which is not recommended) or adapt MOLEX (not necessarily bad, but also not recommended nor desirable). So this PSU will work for me by adapting MOLEX to SATA, but I am just confused why in 2020 they'd be including two different cables with a total of 4 MOLEX connectors. You need maybe 1 of those cables just in case, that's about it. ... show more
Reviewed in the United States on March 12, 2021 by Jeremy

  • Great Powersupply!
Size: 1200W
Came well packaged and has every possible cable you would need for power. Fully modular so you only plug in and use the cables you need. Super quiet, I can't even hear the thing, but typically you wouldn't hear the PSU fan anyways with case fans overpowering audible levels typically. I have this paired with a be quiet! case as well so the whole unit is mostly silent. Easy to install as well. To Amazon: Ship this thing in a well packed box next time. This was shipped standalone by itself (in it's own product box) and was beat up pretty bad during shipping. Luckily be quiet! packed this thing super good so nothing was damaged. This is the first time I've been shipped expensive electronics standalone! Do not do this! ... show more
Reviewed in the United States on January 23, 2021 by Lantzalot

  • It is QUIET!
Size: 1200W
It is feeding my hungry AMD 3690 Threadripper and ASROCK CREATOR MOBO and I have no complaints about so far. Purchased it in Aug 2020 and I am happy. I've got lot's of room for the GPU on order so I'm looking forward to making some cool visuals and rendering fast!
Reviewed in the United States on November 6, 2020 by John L

  • Does what it says on the tin
Size: 650W
I had no idea how much noise pollution my old power supply was adding to my home office. I am delighted to have this new "be quiet" component.
Reviewed in the United States on May 14, 2020 by Hal Eisen

  • Fantastic and quiet!
Size: 750W
This is THE most quiet power supply I've ever owned. It is truly worthy of the name. Easy to install, fully modular, cables are easy to run and manipulate. I would definitely buy another and recommend it to others.
Reviewed in the United States on May 19, 2020 by AG

Can't find a product?

Find it on Amazon first, then paste the link below.