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Black 420mm radiator with three 140mm fans, black pump block and sleeved tubes

be quiet!

be quiet! SILENT LOOP 3 420mm liquid cooler BW026

SKU CH-S58Z-80RT9 MPN BW026

A 420 mm all-in-one liquid cooler with three 140 mm PWM fans, a 3500 RPM three-chamber pump and a refill port for Intel LGA 1700 and AMD AM5 sockets

  • TypeLiquid Cooling System
  • Block CompatibilityAMD Socket AM4 / AMD Socket AM5 / AMD Socket sTR4 / AMD Sock
  • Block Dim.93.5 x 80 x 56 mm
  • Pump Speed1700 - 3500 RPM
  • Radiator Size457 x 140 x 27 mm
  • Radiator MaterialAluminum / Black Spray Painted

Fan Size 3 Fan Slots (140mm)

  • Virtually inaudible operation from 3 Silent Wings 4 140mm PWM fans with radiator corners
  • 3-chamber pump design with 6-pole motor reduces turbulence and runs 1700 to 3500 RPM
  • Easy refill port plus 100 ml coolant bottle extends usable life
  • 420mm aluminum radiator with 457 x 140 x 27 mm dimensions maximises heat dissipation
  • Supports Intel LGA 1851 1700 1200 1155 1151 1150 and AMD AM5 AM4 TR5 TR4 sockets

420mm all-in-one liquid cooler

The be quiet! SILENT LOOP 3 420mm is an all-in-one liquid cooler built for high-end desktop processors. It supports current Intel LGA 1851, 1700, 1200, 1150, 1151 and 1155 sockets plus AMD AM5, AM4, sTR5 and sTR4 platforms. The 457 x 140 x 27 mm radiator mounts three 140 mm Silent Wings 4 fans for flagship CPU thermal loads.

Three-chamber pump and 100 ml coolant capacity

A dampened, adjustable pump with a 6-pole motor runs between 1700 and 3500 RPM through a three-chamber design that reduces turbulence. The loop holds 100 ml of coolant and includes a refill port with a spare bottle for extended service life. The cold plate covers 1800 mm² of fin area to spread heat from overclocked Core i9 or Ryzen 9 parts before the fluid reaches the radiator.

Three 140 mm PWM fans on a 420 mm radiator

Three 140 x 140 x 25 mm fans with fluid-dynamic bearings connect via 4-pin PWM and spin up to 1900 RPM. At full speed they deliver 78.4 CFM (133.2 m³/h) at 2.36 mmH₂O static pressure. The 400 mm sleeved tubes set the practical reach between the 93.5 x 80 x 56 mm block and the radiator, so case clearance must accommodate the 457 mm length and triple-fan width.

Highlights

  • Virtually inaudible operation from 3 Silent Wings 4 140mm PWM fans with radiator corners
  • 3-chamber pump design with 6-pole motor reduces turbulence and runs 1700 to 3500 RPM
  • Easy refill port plus 100 ml coolant bottle extends usable life
  • 420mm aluminum radiator with 457 x 140 x 27 mm dimensions maximises heat dissipation
  • Supports Intel LGA 1851 1700 1200 1155 1151 1150 and AMD AM5 AM4 TR5 TR4 sockets

Specifications

Brandbe quiet!
ModelSILENT LOOP 3 420mm
Part NumberBW026
TypeLiquid Cooling System
Block CompatibilityAMD Socket AM4 / AMD Socket AM5 / AMD Socket sTR4 / AMD Socket sTR5 / Intel LGA 1150 / Intel LGA 1151 / Intel LGA 1155 / Intel LGA 1200 / Intel LGA 1700 / Intel LGA 1851
Block Dim.93.5 x 80 x 56 mm
Pump Speed1700 - 3500 RPM
Radiator Size457 x 140 x 27 mm
Radiator MaterialAluminum / Black Spray Painted
Fan Size3 Fan Slots (140 mm)
Fan Dim.140 x 140 x 25 mm
Bearing TypeFDB
Fan RPM1900 RPM at 100% PWM
Fan Air Flow78.4 CFM / 133.2 m3/h at 100% PWM / 12V
Fan Connector4-pin PWM
ColorBlack
LED ColorNon LED
Pressure2.36 mmH2O at 100% PWM / 12V
Tube Dim.400 mm
Coolant Capacity100 ml
Shipping weight3.22 kg
Package size508 × 203 × 152 mm

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Questions about this item

Will the Silent Loop 3 420mm fit my older Intel LGA 1200 board?

Yes, the cold plate supports LGA 1200 along with LGA 1150, 1151, 1155, 1700 and 1851.

How can I verify the pump is running at the rated 3500 RPM after installation?

Connect the pump header to a 4-pin PWM source and monitor speed in BIOS or software; it should report up to 3500 RPM.

Does the box include the 100 ml coolant bottle for the refill port?

Yes, a coolant bottle is supplied so you can top up the loop through the easy-access refill port.

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