
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
| Brand | be quiet! |
|---|---|
| Series | be quiet! Dark Rock 4 |
| Model Number | BK021 |
Design
| Cooler Type | Air Tower |
|---|---|
| Tower Type | Single-Tower |
| Height | 160 mm |
| Socket Compatibility | AMD AM4/AM5, Intel LGA1700/1200/115X/2066/2011-3 |
Performance
| Fan Count | 1 |
|---|---|
| TDP Rating | 200 W |
| Noise Level | 21.4 dBA |
| RGB Lighting | No |
Cooler class
| Tower Layout | Single-Tower |
|---|
Air fit and clearance
| Cooler Width | 136 mm |
|---|---|
| Cooler Weight | 920 g |
Thermal capability
| Heatpipe Count | 6 |
|---|
Fans
| Fan Size | 135 mm |
|---|---|
| Max Speed | 1400 RPM |
| Bearing Type | Fluid Dynamic |
| PWM Control | Yes |
Lighting and display
| Lighting | None |
|---|
Ownership
| Warranty | 3 years |
|---|
| Source URL | https://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.
Compare and read more
- be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP) vs Cooler Master MasterLiquid ML360 Sub-Zero (360mm AIO Liquid/Integrated TEC Thermoelectric Cooling/3x ARGB Fans/Extreme Cooling Tier)
- be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP) vs Fractal Design Celsius+ S36 (360mm AIO Liquid/3x Dynamic 2 PWM Fans/RGB Pump Cap/Refined Minimalist Design)
- be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP) vs Zalman CNPS20X (Dual-Tower Air/8 Heatpipes/Dual 140mm ARGB Fans/165mm Height/Flagship RGB Tower)
- Alpenföhn Brocken 4 (Dual-Tower Air/6 Heatpipes/Dual 120mm-140mm Fans/160mm Height/German-Engineered Quiet Cooling) vs be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP)
- be quiet! Dark Rock 4 (Single-Tower Air/159mm Height/Single 135mm Silent Wings Fan/190W TDP) vs Enermax LIQTECH TR4 (360mm AIO Liquid/Full IHS Coverage Cold Plate/3x ARGB Fans/AMD Threadripper sTRX4-TR4 Specific)
