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be quiet! Dark Rock 4 single-tower CPU air cooler with 135mm Silent Wings fan
be quiet!

be quiet! Dark Rock 4

Expert rating7.9 / 10

Cooler Type:
Air Tower
Height:
160 mm
Fan Count:
1
Socket Compatibility:
AMD AM4/AM5
Noise Level:
21.4 dBA

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Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.

Manufacturer: be quiet! Last updated: September 12, 2026

be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP) Review

If you're comparing the be quiet! Dark Rock 4 against other quiet air coolers, it's be quiet!'s mid-tier single-tower option, an all-black cooler with a single 135mm Silent Wings fan rated for 190W, sitting a step below the Dark Rock Pro line.

We'd recommend it to anyone who wants be quiet!'s noise engineering without paying Dark Rock Pro money, since a single well-designed 135mm fan at 21.4dBA gets most builds cool enough without ever becoming the loudest thing in the room.

Thermal Performance and TDP Rating

be quiet! rates the Dark Rock 4 for 190W, enough for most current mid-range AM5 and LGA1700 chips running stock or lightly tuned, though it's not the cooler we'd pick for a heavily overclocked flagship CPU.

Fan Design and Noise

A single 135mm Silent Wings 3 fan is the whole story here, rated at 21.4dBA, and be quiet!'s reputation for noise engineering holds up in practice: it's genuinely one of the quieter coolers at this TDP rating, at the cost of the extra performance a second fan would add.

Socket Compatibility and Installation

AM4/AM5 and LGA1700/1200 are supported out of the box, and be quiet!'s mounting hardware is straightforward if not quite as polished as Noctua's SecuFirm2 system.

Design and Build

The all-black finish with copper heatpipes and be quiet!'s split-fin heatsink design looks understated next to RGB-heavy competitors, which is exactly the point for a brand built around not drawing attention to itself.

Comparison to Alternatives

Against be quiet!'s own Shadow Rock 4, covered elsewhere on this site, the Dark Rock 4 uses a wider heatsink and typically edges it out thermally at a similar noise level, so we'd pick the Dark Rock 4 first unless case width is tight. Against the Dark Rock 5, also on this site, the 5 is the newer dual-fan design with a real thermal advantage, so anyone who can spend a bit more should look there instead.

Specifications

Identity

Brandbe quiet!
Seriesbe quiet! Dark Rock 4
Model NumberBK021

Design

Cooler TypeAir Tower
Tower TypeSingle-Tower
Height160 mm
Socket CompatibilityAMD AM4/AM5, Intel LGA1700/1200/115X/2066/2011-3

Performance

Fan Count1
TDP Rating200 W
Noise Level21.4 dBA
RGB LightingNo

Cooler class

Tower LayoutSingle-Tower

Air fit and clearance

Cooler Width136 mm
Cooler Weight920 g

Thermal capability

Heatpipe Count6

Fans

Fan Size135 mm
Max Speed1400 RPM
Bearing TypeFluid Dynamic
PWM ControlYes

Lighting and display

LightingNone

Ownership

Warranty3 years
Source URLhttps://www.bequiet.com/en/cpucooler/1376

Expert Review

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating7.9 / 10

A dependable, genuinely quiet single-tower cooler that's been slightly outclassed by be quiet!'s own newer Dark Rock 5, but still a solid mid-tier pick on sale.

Best for

  • Builders who want be quiet!'s noise-focused engineering at a mid-tier price
  • 190W-class CPUs running at or near stock clocks
  • Anyone who wants an all-black cooler with no RGB

Not for

  • Heavily overclocked or high-TDP flagship CPUs
  • Builders who could stretch to the newer Dark Rock 5 for better thermals
  • Anyone wanting dual-fan push-pull cooling out of the box

FAQs

What are the key specifications of the be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP)?

The be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP) is a CPU cooler from be quiet!. Key specs: Cooler Type Air, Single-Tower, Tower Type Single-Tower, Split Heatsink, Height 159mm, Socket Compatibility AMD AM4/AM5, Intel LGA1700/1200, Fan Count 1.

Will the be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP) work with my current setup?

The be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP) lists Socket Compatibility is AMD AM4/AM5, Intel LGA1700/1200. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.

Who is the be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP) best suited to?

It suits builders who want be quiet!'s noise-focused engineering at a mid-tier price, 190w-class cpus running at or near stock clocks, anyone who wants an all-black cooler with no rgb.

What are the drawbacks of the be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP)?

It is a poor fit for heavily overclocked or high-tdp flagship cpus, builders who could stretch to the newer dark rock 5 for better thermals, anyone wanting dual-fan push-pull cooling out of the box.

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