The be quiet! Silent Loop 3 – 420 mm is a high-end all-in-one liquid cooler designed for maximum cooling capacity with minimal noise. Featuring a massive 420 mm radiator, silent-optimized fans, and ARGB lighting, it ensures superior thermal performance for even the most demanding CPUs. Its refillable design, premium materials, and sleek aesthetic make it a reliable choice for enthusiasts and professionals seeking quiet power and durability.

Key Features:

• Large 420 mm radiator for exceptional heat dissipation

• Three ultra-quiet 140 mm PWM fans with fluid-dynamic bearings

• ARGB illumination on the pump block for customizable aesthetics

• Refillable system with maintenance port for extended service life

• Nickel-plated cold plate compatible with liquid metal thermal compounds

Specifications:

• Dimensions: Radiator: 456 × 140 × 30 mm

• Weight: Approx. 1.7 kg

• Materials: Copper cold plate, aluminum radiator, braided hoses

• Connectivity / Compatibility: Intel LGA 1700/1200/115x/2066 and AMD AM5/AM4/sTRX4/TR4

• Battery: Not applicable

• Power Supply: Powered via 4-pin PWM and 3-pin ARGB motherboard headers

Additional Features:

• Silent Loop three-chamber pump design for reduced noise and vibration

• High-density fin array for maximum cooling surface area

• Braided, flexible hoses with generous diameter for optimal flow

• ARGB controller included for systems without native ARGB support

• Maintenance port with sealing cap for easy refills

Customer Benefits:

Delivers superior cooling performance and whisper-quiet operation, even on high-TDP or overclocked CPUs. Its premium build quality, refillable design, and ARGB lighting create a long-lasting, customizable, and efficient cooling solution.

What’s in the Box:

• Silent Loop 3 420 mm AiO cooler (radiator, pump block, hoses)

• Three 140 mm Silent Wings PWM fans

• Mounting hardware for Intel and AMD sockets

• ARGB controller

• Thermal paste

• User manual

• Warranty and registration information

Compliance:

This product meets all applicable European and international standards (such as CE, FCC, RoHS, REACH, WEEE, etc.). It has been designed and tested for maximum safety, performance, and environmental responsibility.

Manufacturer Contact:

For product support, warranty claims, or technical assistance, please reach out to the official manufacturer:

Company Name: Listan GmbH & Co. KG
Address: Biedenkamp 3A, 21509 Glinde, Germany
Email: service(at)bequiet(dot)com