Skip to main content
be quiet! Straight Power 12 1500W ATX 3.0 PCIe 5.0 80+ Platinum PSU | Native 12V-2x6 Cable, Silent 135mm Fan, Fully Modular Design, LLC Topology, Japanese 105°C Capacitors, 10-Year Warranty
be quiet!

be quiet! Straight Power 12 1500W ATX 3.0 PCIe 5.0 80+ Platinum PSU

Bottom line: The be quiet! Straight Power 12 1500W ATX 3.0 PCIe 5.0 80+ Platinum PSU ($254.90 on Amazon as of 2026-10-06): 1500W on one 12V rail, handles excursions to 2x rated power; main trade-off: 1500W is overkill and wasted spend for single-GPU mid-range builds.

$254.90

As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →

Buy on Amazon — $254.90 Compare to similar power supplies

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 1500W on one 12V rail, handles excursions to 2x rated power
  • ✓ 80 PLUS Platinum, up to 93.9% efficiency and under 0.1W standby drain
  • ✓ Native 12V-2x6 cable for PCIe 5.0 plus four 6+2-pin PCIe connectors
  • ✓ 135mm Silent Wings fan: fluid-dynamic bearing, 6-pole motor, funnel inlet
  • ✓ 10-year warranty and Japanese 105C capacitors for long-term stability

Cons

  • ✗ 1500W is overkill and wasted spend for single-GPU mid-range builds
  • ✗ ATX 3.0, not the newer ATX 3.1 revision
  • ✗ Fully modular cable bundle adds bulk in small-form-factor chassis

Manufacturer description

The be quiet! Straight Power 12 1500W is built for systems where headroom is not optional. It delivers 1500W of continuous power on a single massive 12V rail, and handles power excursions up to double its rated wattage - the transient behavior modern flagship GPUs demand. Certified 80 PLUS Platinum with efficiency up to 93.9% and standby drain under 0.1 watts, it wastes less energy as heat, which keeps your case cooler and your fan curves calmer. As an ATX 3.0 unit with PCIe 5.0 support, it ships with a native 12V-2x6 cable plus four 6+2-pin PCIe connectors, so it drives a next-gen card…

Related Products

Other products in this category you may like:

SpecPicks Verdict

SpecPicks scored be quiet! Straight Power 12 1500W ATX 3.0 PCIe 5.0 80+ Platinum PSU using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. be quiet!'s power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Will this power an RTX 5090 or other 12VHPWR graphics card?

Yes. The Straight Power 12 1500W has a native 12V-2x6 connector integrated for PCIe 5.0 cards, so no adapter is needed. It also includes four 6+2-pin PCIe connectors for current-gen GPUs.

Is 1500W more than I need?

For a single mid-range GPU, yes. This unit targets high-end multi-GPU, workstation, and flagship-card builds where transient spikes matter - it absorbs power excursions up to double its 1500W rating.

How loud is the fan?

be quiet! rates the 135mm Silent Wings fan as virtually inaudible. It uses an optimized blade design, a fluid-dynamic bearing, and a 6-pole motor to cut operational noise, paired with a funnel-shaped inlet that reduces turbulence.

What warranty does be quiet! provide?

be quiet! lists a 10-year manufacturer warranty on the Straight Power 12 1500W. Check the product listing for registration requirements and current terms in your region.

How efficient is it, and does that lower my power bill?

It is 80 PLUS Platinum certified with efficiency up to 93.9%, and standby drain stays below 0.1 watts. Less input power is lost as heat, so the unit runs cooler and quieter under sustained load.

Key Features

  • Straight Power 12 1500W is certified with 80 PLUS Platinum and an energy efficiency rating of up to 93.9%. This provides lots of benefits for your high-end system, including less power consumption and an overall cooler and quieter operation. The standby drain is below 0.1 watts.
  • Straight Power 12 1500W 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 4 PCIe 6+2-pin connectors for support of current-gen GPUs. This makes the PSU extremely versatile and the perfect choice for powerful systems of today and the ones to come.
  • Straight Power 12 offers 1500W of continuous power with one massive 12V rail. Even if the graphics card demands excessive power for a short time: Straight Power 12 1500W handles power excursions up to double its rated power with ease. This ensures reliable operation with the next generation of processors and graphics cards.
  • The high-end Silent Wings fan delivers best-of-class airflow yet produces very little noise. This is thanks to its unique, optimized fan blade design along with an advanced fluid-dynamic bearing and 6-pole fan motor that largely eliminates operational noise, has a super-long life and minimal power consumption.
  • The funnel-shaped fan inlet of the Straight Power 12 1500W increases airflow while reducing unwanted turbulence for a higher cooling performance. The wire-free design inside allows the cool air to reach all components which ultimately leads to a longer lifespan.

Full Specifications

Brandbe quiet!
Wattage750 watts
Fan Size13.5 centimeters
Model NameBN518
Unit Count1 Count
Form FactorATX 3.0
Model NumberBN518
Connector TypePCI Express
Cooling MethodAir
Number of Fans1
Output Wattage1500 watts
Item Dimensions7.09 x 5.91 x 3.39 inches
Mfr Part NumberBN518
Compatible DevicesDesktop, Gaming Desktop
Connector Quantity1
Power Supply DesignFull Modular
Warranty Description1 Year
Maximum Input Voltage115 volts_of_direct_current
Minimum Input Voltage115 volts
Item dimensions L x W x H7.09 x 5.91 x 3.39 inches
Full listing titlebe quiet! Straight Power 12 1500W ATX 3.0 PCIe 5.0 80+ Platinum PSU | Native 12V-2x6 Cable, Silent 135mm Fan, Fully Modular Design, LLC Topology, Japanese 105°C Capacitors, 10-Year Warranty

Ready to buy?

be quiet! Straight Power 12 1500W ATX 3.0 PCIe 5.0 80+ Platinum PSU | Native 12V-2x6 Cable, Silent 135mm Fan, Fully Modular Design, LLC Topology, Japanese 105°C Capacitors, 10-Year Warranty is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $254.90

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Related Power Supplies

Keep exploring SpecPicks

Other buying guides

Browse the catalog

Editorial

More guides & deep dives from the SpecPicks archive

Browse all articles & guides →

More reviews from the SpecPicks archive

Browse all reviews →

Earliest SpecPicks reviews

Browse full archive →
be quiet! Straight Power 12 1500W ATX 3.0 PCIe 5.0 80+ Platinum PSU | Native 12V-2x6 Cable, Silent 135mm Fan, Fully Modular Design, LLC Topology, Japanese 105°C Capacitors, 10-Year Warranty
$254.90
View on Amazon →