be quiet! BK021 Rock 4 200W TDP

$64.97

(8 customer reviews)
Last updated on July 16, 2025 5:00 am
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$64.97 eBay
July 27, 2025
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July 27, 2025
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$64.97 eBay
July 16, 2025
Since July 27, 2025
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Specification: be quiet! BK021 Rock 4 200W TDP

Product
Brand

Model

BK021

Product Type

CPU Fans

Main
Color

Charcoal

Specification
Best Seller Ranking

#34 in CPU Fans & Heatsinks

Power Connector

4 Pin

Features

Virtually inaudible Silent Wings 135mm PWM fan.Achieves only 21.4dB(A) at maximum fan speed.Six high-performance copper heat pipes.Airflow-optimized, wave-contoured cooling fins.Easily installable black installation kit can be mounted from above.Supports an additional 120mm fan, clips are included in scope of delivery.Brushed aluminum top cover with diamond cut finish.German product conception, design and quality control.

Weight

920g

Heatsink Dimensions

74.00 x 136.00 x 160.00 mm

Fan Dimensions

135.00 x 135.00 x 22.00 mm PWM

Max CPU Cooler Height

159 mm

Heatsink Material

Aluminum & Copper

Noise Level

21.4 dBA (Max.)

RPM

1400 RPM (Max.)

Bearing Type

Fluid Dynamic

Fan Size

135mm

Type

Fan & Heatsinks

Series

Dark Rock 4

Date First Available

October 01, 2018

CPU Socket

1150AMD: AM4, 1151, 1155, 1156, 1200, 1366, 1700, 2011 (-3) Square ILM, AM2+, AM3+, FM1, FM2+, Intel LGA 2066

Photos: be quiet! BK021 Rock 4 200W TDP

8 reviews for be quiet! BK021 Rock 4 200W TDP

4.4 out of 5
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  1. Chase L.

    Pros: -Very sleek/industrial design -Not overly flashy -Very quiet -Straightforward install Cons: -If you’re not careful with the fan clips you could damage the finish Overall Review: -Be mindful of the size of the cooler, If you are going to install it in something right on the edge of your clearance you may have issues if all of your DIMM slots are occupied -Fit just right into my Phanteks P400 TG case clearance was 160mm.

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  2. Phuc T.

    Pros: Can keep my CPU at 35 Degrees at idle When stressed hovers between 70-85 degrees (although stress tests aren’t realistic compared to real use) Comes with 1 fan Fan stays silent even at max load Cons: With the fan towards my ram on my ASRock Z370 Pro4, it may interfere if you have 4 sticks of ram instructions weren’t 100% clear to me (didn’t read the manual properly) Overall Review: Would recommend if you don’t use cpu intense applications Comes with everything you need (Thermal paste,…

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  3. Arthur C.

    Pros: Quiet fan Keeps CPU at good temps Cons: ? Overall Review: Sleek black look with a very quiet fan. Keeps temps at a very consistent level, currently with a Ryzen 2600x

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  4. Garrett S.

    Pros: Short review: I would buy this again ________ – Keeps my new Ryzen chip very cool (even under heavy strain) – Works with both AMD/Intel – Relatively easy setup – No noise – Quality materials used Cons: I have a single con and I’m willing to split the negative with the “be quiet” folks. — Be VERY observant about the process steps in installing this heat sink. For starters DO NOT mount the motherboard in the case and then put in the heatsink. You need to put the processor and heatsink…

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  5. Anonymous

    Pros: – Looks great. – Keeps my 2700X at 71C under stress test (stock). – SUPER quiet, inaudible at idle and a gentle whoosh at load. Cons: – Price is high, even considering the great quality. Overall Review: Installation process is okay, would definitely be easier outside the case but it’s possible to do it in the case if your motherboard tray has a backplate cut out. Comes with a dope screw driver.

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  6. Dominique H.

    Pros: Looks are second to none. Best looking tower style cooler out there in my opinion. Keeps my 3900X nice and chilly. Runs nearly silent at idle and still pretty quiet under load. Easy installation. Cons: I wish it came with more thermal paste however, it was enough just make sure you get it right the first time. Overall Review: Looks good, keeps my CPU temps at respectable temps, and she’s super quiet. Did I mention she looks good?!

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  7. JANINE K.

    Pros: Ceramic coating and tight fin stack. Ease of use (as big as it is). Extra fan clip. Love the Be Quiet screwdriver. (have other drivers but found myself using this more and more) Feels premium and for the price I don’t see how it could be beat at TDP of 200watts. Cons: The 135mm fan is a mistake and looks terrible. This tower should have the 120mm version. (would help some ram clearing issues) I would rather have the 120mm pure wings over the 135mm but 2 silent wings 3 would be ideal….

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  8. HS

    Pros: – Decent cooler, better thermals than my previous CM 212 EVO – Very good looking, classy cooler – Fan sounds good, very quiet (as name implies) and actually sounds good compared to other fans at max RPM Cons: – If you are planning to use the RAM slot closest to your CPU socket look up the height of your RAM module to ensure fit. – I had to move the fan up quite a bit due to the height of my RAM (G.SKILL Trident Z RGB) – The clips that hold the fan are very hard to use. – You need to…

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