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Be Quiet! 600W SFX-L Power PSU, Small Form Factor, Fully Modular, 80+ Gold, Continuous Power, SFX-to-ATX Bracket Included
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Be Quiet! 600W SFX-L Power PSU

Bottom line: The Be Quiet! 600W SFX-L Power PSU: 80 PLUS Gold certified, up to 92% conversion efficiency; main trade-off: 600W ceiling is thin for an RTX 4080/4090-class card.

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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.

Pros & Cons

Pros

  • ✓ 80 PLUS Gold certified, up to 92% conversion efficiency
  • ✓ Single powerful 12V rail rated for 600W continuous, not peak
  • ✓ Fully modular cabling keeps mini-ITX builds clear of dead cable bulk
  • ✓ Temperature-controlled 120mm fan holds noise down under load
  • ✓ SFX-to-ATX bracket included, so it drops into full-size cases too

Cons

  • ✗ 600W ceiling is thin for an RTX 4080/4090-class card
  • ✗ SFX-L depth exceeds standard SFX, so verify case clearance
  • ✗ 120mm fan spins in small cases with limited airflow paths
  • ✗ Modest 133-review sample gives less long-term reliability signal

Manufacturer description

be quiet! SFX L Power 600W is especially recommended for mini ITX PCs and compact gaming systems. It performs well beyond the ordinary, with a great combination of quietness, features, reliability and efficiency.

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SpecPicks Verdict

SpecPicks scored Be Quiet! 600W SFX-L Power 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.

Key Features

  • 600 Watts of continuous power and powerful 12V-rail design offer high stability and performance
  • 80PLUS Gold certification with up to 92% power conversion efficiency
  • Full cable management offers maximum build flexibility and convenient usage
  • Quiet operation thanks to temperature-controlled 120mm high-quality fan
  • SFX-to-ATX PSU adapter bracket makes possible usage with larger case sizes
  • Product conception, design and quality control in Germany

Full Specifications

Brandbe quiet!
Wattage600 watts
Fan Size12 centimeters
Model NameAlimentation
Unit Count1 Count
Form FactorSFX
Model NumberBN239
Connector TypeATX
Cooling MethodAir
Number of Fans1
Output Wattage600 watts
Item Dimensions5.12 x 4.92 x 2.52 inches
Mfr Part NumberBN239
Number of Items1
Number of Packs1
Compatible DevicesPersonal Computer
Connector Quantity4
Power Supply DesignFull Modular
Maximum Input Voltage12 volts_of_direct_current
Minimum Input Voltage100 volts_of_direct_current
Full listing titleBe Quiet! 600W SFX-L Power PSU, Small Form Factor, Fully Modular, 80+ Gold, Continuous Power, SFX-to-ATX Bracket Included

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Be Quiet! 600W SFX-L Power PSU, Small Form Factor, Fully Modular, 80+ Gold, Continuous Power, SFX-to-ATX Bracket Included 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.

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Be Quiet! 600W SFX-L Power PSU, Small Form Factor, Fully Modular, 80+ Gold, Continuous Power, SFX-to-ATX Bracket Included
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