be quiet!

be quiet! Silent Loop 3 420mm, ARGB Lighting, AiO Liquid CPU Cooler

Name: be quiet! Silent Loop 3 420mm, ARGB Lighting, AiO Liquid CPU Cooler
Brand: be quiet!
SKU: B0DWZX4SSK

Bottom line: The be quiet! Silent Loop 3 420mm: Three Silent Wings 4 140mm PWM fans for near-silent operation; main trade-off: needs a case with 420mm top or front radiator clearance.

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-21

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Pros & Cons

Pros

✓ Three Silent Wings 4 140mm PWM fans for near-silent operation
✓ 6-pole motor pump with 3-chamber design reduces turbulence and noise
✓ Large 420mm radiator gives high cooling headroom for hot CPUs
✓ Refill port and included coolant bottle extend loop lifespan

Cons

✗ Needs a case with 420mm top or front radiator clearance
✗ Premium pricing sits above many 360mm AIO coolers
✗ ARGB lighting is deliberately discreet, not a bright showpiece
✗ Refillable loop adds occasional upkeep vs sealed AIOs

SpecPicks Verdict

SpecPicks scored be quiet! Silent Loop 3 420mm using a rating × review-volume × price-fit model applied to published specs and reviews across the retro cpu coolers & fans category. be quiet!'s retro cpu coolers & fans lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for retro cpu coolers & fans of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

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

Full Specifications

Brand	be quiet!
Model	BW026
Voltage	12 volts
Wattage	3.6 watts
Material	Aluminum, Copper
Unit Count	1 Count
Noise Level	34.3 db
Part Number	BW026
Material Type	Aluminum, Copper
Cooling Method	Water
Number of Items	1
Number of Packs	1
Compatible Devices	Intel sockets: 1851/1700/1200/1151/1150/1155 \| AMD sockets: AM5/AM4/TR5/TR4
Power Connector Type	4-Pin
Maximum Rotational Speed	2500 rpm
Item Dimensions L x W x H	17.99"L x 5.51"W x 1.06"H
Global Trade Identification Number	04260052192559

Ready to buy?

be quiet! Silent Loop 3 420mm, ARGB Lighting, AiO Liquid CPU Cooler is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. It also has an Amazon listing — check it for current price and availability. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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