BE QUIET

be quiet! Silent Loop 3 420mm AIO liquid CPU cooler – Black

Cable length0.5 m
Airflow133.2
Width140 mm
Fan connector4-pin
Package typeBox

The be quiet! Silent Loop 3 (BW026) is a 420mm all-in-one liquid cooler built around a three-chamber pump design that cuts turbulence and keeps noise levels remarkably low — making it one of the quietest AIO CPU coolers available for high-performance builds.

Description

Near-Silent Cooling With a 420mm Radiator

Three 140mm Silent Wings 4 PWM fans with radiator corners engineered for low-noise, high-airflow operation
Dampened, adjustable 6-pole pump motor reduces vibration and acoustic output
Discreet ARGB lighting on the pump head for a clean, premium aesthetic
Easy-access refill port with included coolant bottle for long-term maintenance
Broad socket support: Intel LGA 1700, LGA 1851, LGA 1200 and AMD AM4, AM5, TR4, TR5

Designed for enthusiasts and silent-build creators who need serious thermal headroom for overclocked processors or multi-core workloads without fan noise becoming a distraction.

Specifications

General

Brand	BE QUIET
Model name	Silent Loop 3 420mm
Product colour	Black
Type	All-in-one liquid cooler
Manual	Yes
Tube length	400
Bearing type	Fluid Dynamic Bearing (FDB)
Fan diameter	140
Mounting kit	Yes
Number of fans	3
Radiator depth	457
Radiator width	140
Thermal grease	Yes
Radiator height	27
Illumination LED	Yes
Waterblock depth	56
Waterblock width	80
Radiator material	Aluminum
Suitable location	Processor
Waterblock height	93.5
Base plate material	Copper
Illumination colour	Multi
Fan dimensions (W x D x H)	120 x 120 x 25
Shipping (inner) case width	424
Shipping (inner) case height	336
Shipping (inner) case length	511
Fan's mean time to failure (MTTF)	300000
Products per shipping (inner) case	4
Shipping (inner) case gross weight	14800
Warranty	3 years
EAN	4260052192559

Processor

CPU bracket(s)	Yes
Supported processor sockets	LGA 1150 (Socket H3)/LGA 1151 (Socket H4)/LGA 1155 (Socket H2)/LGA 1200 (Socket H5)/LGA 1700/LGA 1851/Socket AM4/Socket AM5/Socket TR4/Socket TR5

Ports

Fan connector	4-pin
Pump connector	4-pin
LED connector type	3-pin

Battery & power

Cable length	0.5 m
Fan current	0.3
Fan voltage	12
LED voltage	5
Fan power consumption	3.6

Performance & capacities

Airflow	133.2
Fan speed (max)	1900
Maximum airflow	78.4
Pump motor speed	3500
Maximum air pressure	2.36
Pump motor speed (max)	3500
Pump motor speed (min)	1700
Noise level (low speed)	19.4
Noise level (high speed)	34.3