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be quiet! · 420 mm liquid cooler · 420 mm radiator

be quiet! Silent Loop 3 420mm CPU AIO Liquid Cooler

3 fans · 34.3 dBA

Performance
100%
Perf / price
31
Acoustics
55
Amazon
$140
be quiet! Silent Loop 3 420mm CPU AIO Liquid Cooler
View be quiet! Silent Loop 3 420mm CPU AIO Liquid Coole Gallery in high resolution
$140
Available on Amazon Updated Aug 30, 2026 Prime FBA
Performance100.0%
Performance / price31.5
Acoustics55.4
$140 on Amazon Cooler table Compare this cooler

Check this cooler in a buildSelect a CPU and case first so socket, height, and radiator support can be evaluated. Start with the CPU

Written analysis

be quiet! Silent Loop 3 420mm CPU AIO Liquid Cooler at a glance

The be quiet! Silent Loop 3 420mm CPU AIO Liquid Cooler is a 420 mm liquid cooler cooler listed as 420 mm radiator. It is listed with 3 140 mm fans.

Review-derived relative cooling performance is 100.0%. Recorded noise is 34.3 dBA, for an acoustics score of 55.4. Airflow is listed at 78.4 CFM. Warranty is 3 years.

Best fit: High-TDP CPUs and sustained workloads where cooling headroom matters most.

Fitment and sockets

Radiator class is 420 mm — confirm case radiator support. Socket compatibility includes 1851, 1700 , 1200, 1150, 1151, 1155, AM4, AM5, sTR4, sTR5. CPU block / cold plate: Copper.

Current value

At $140, performance / price is 31.5. Compare nearby coolers of the same type below; quieter acoustics and fitment can outweigh a small score gap.

Cooler data

Full specifications

Cooling type, fitment, sockets, fans, acoustics, features, and value in one technical sheet.

General

Manufacturer
be quiet!
Cooler
be quiet! Silent Loop 3 420mm CPU AIO Liquid Cooler
Warranty
3 years
Launch price
—
Amazon price
$140
Amazon availability
Available
Price updated
Aug 30, 2026

Cooling type & fit

Type
420 mm liquid cooler
Size class
420 mm radiator
Height
27 mm
Radiator class
420 mm
Radiator dimensions
457 x 140 x 27
Weight
3.00 kg

Value

Amazon price
$140
Relative performance
100.0%
Performance / price
31.5
Acoustics
55.4

Sockets & block

Socket compatibility
1851, 1700 , 1200, 1150, 1151, 1155, AM4, AM5, sTR4, sTR5
CPU block
Copper

Fans & acoustics

Fan size
140 mm
Fan count
3
Fan speed
1900 rpm
Noise
34.3 dBA
Airflow
78.4 CFM
Acoustics score
55.4

Features

RGB lighting
No
Thermal paste included
No
Display
—
Color
—

Amazon

Price history

Nearby performance

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Vendor copy

Amazon listing details

Marketplace feature text kept for reference. Structured specifications above are the source for scores and comparisons.

Powerful 3-chamber pump design significantly reduces turbulences and noise

Dampened and adjustable pump with 6-pole motor

3 Silent Wings 4 140mm PWM high-speed fans with radiator corners for virtually inaudible operation

Incredibly high cooling performance with engineered cooling block

Wide CPU plate coverage with threadripper support

Easy-to-access refill port and included coolant bottle for a long lifespan

Flexible sleeved tubes and a convenient mounting ensure easy handling

3-year manufacturer’s warranty

German Design I German Engineering I German Quality I German Performance

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