Can the Silent Loop 3 420mm Justify Its Size? Be Quiet AIO Review

With CPU package power on an upward trajectory, we are seeing more 420mm AIO coolers hitting the market. The latest AIO unit we have for review is the Silent Loop 3 420 from be quiet! It’s the company's first 420mm AIO, featuring a 3-chamber pump design, a high-density cold plate fin stack, and an easy-access filling port. It's also equipped with be quiet! s premium Silent Wings 4 PWM fans and ARGB lighting.

be quiet! says that all this combined will produce low noise, high performance cooling, so let's dive straight into this review and find out if that’s true. Read more here: https://www.kitguru.net/components/cooling/james-dawson/be-quiet-silent-loop-3-420-aio-cpu-cooler-review/

00:00 Start
00:50 Details / Pricing
02:12 Up close
04:30 CPU Block and Radiator
05:24 Fans
06:54 Accessories and mounts
07:51 AMD Test System / Installation
09:58 Test Results
11:52 Closing Thoughts

Price and availability:
• Available in Black only
• MSRP – $175 (420mm), $165 (360mm) $140 (240mm)
• UK Pricing Scan UK - £124.99 (420) £119.99 (360) £99.98 (240)

Features:
• According to Be quiet! the Silent loop 3 offers high performance cooling for modern CPUs with its powerful 3 chamber pump, a large area high density cold plate fin stack and Silent Wings 4 PWM high speed fans.
• It features a premium yet elegant design with discreet ARGB CPU block lighting, it's available in 420, 360 and 240mm sizes and includes support for all current desktop sockets including an AMD Threadripper mounting frame with 360 and 420mm units.
• As always with be quiet! AIO coolers, the silent loop 3 is equipped with an easy to access refill port for when maintenance is due, and it comes with a 3-year warranty for peace of mind.
Specifications:
• CPU Socket Compatibility: Intel 1851/1700/1200/115X, AMD AM5 / AM4 / TR5 / TR4
• Radiator Material: Aluminium / black spray painted
• Radiator Dimensions: 457 x 140 x 27
• Radiator Tube Length: 400mm
• CPU Block Dimensions (H x W x D): 93.5 x 80 x 56 (mm)
• Pump Speed: 1700 – 3500 RPM
• Cold Plate: Copper / nickel plating
• Pump Connector: 4-pin PWM
• LCD Screen: N/A
• Pump Noise: N/A
• Pump LED: 3-pin 5v ARGB
• VRM Fan: N/A
• Fan Dimensions: 140 x 140 x 25 mm
• Fan LED: N/A
• Fan Speed (PWM): 1900 RPM (Max)
• Fan Max Airflow: 78.4 CFM
• Fan Max Air Pressure: 2.36 mmH2O
• Noise (dBA) at 50% / 75% /100% rpm: 19.4 / 29.3 / 34.3
• Fan Bearing: FDB
• Fan Connector: 4-pin PWM
• Warranty: 3 Years
Heat Sink: N/A
Radiator: Standard 27mm Thickness
• Material – Aluminium - black spray-painted coating
• Fin design –
• Dimensions - 457 x 140 x 27
• Thickness – 27mm

Tubing: Fixed at radiator – No rotation
• Tubing length – 400mm
• Tubing Type - Rubber
• Ribbed tubing – Braided sleeving
CPU Block:
• Cold plate – Bright nickel-plated copper – Good for liquid metal
• Pump Speed – 1700 – 3500 RPM PWM control
• Fittings – Rotary 90 degree
Fans:
• Speed – 1900 RPM Max
• Airflow – 78.4 CFM
• Pressure – 2.36 mmH2O
• Noise – 29.3 dBA Max
• Bearing – Fluid Dynamic Bearing
• Connection – 4-pin PWM
Connections and cables:
• Pump – 4-pin PWM / 3-pin 5V ARGB
• Fans – 4-pin PWM
Notes:
• The only negative with Silent Wings 4 fans is that they are not daisy-chainable, so cable management can look untidy.
• Installation is quick but extra time will be required to neaten up cables since the fans are not daisy chained or mechanically linked together.
•
AMD Test System Specification – (Cooler Test Bench)
• CPU – AMD Ryzen 9 9950X
• Motherboard – ASRock Phantom Gaming X870E Nova WiFi
• Memory: 32GB (2 x 16GB Modules) Kingston Fury DDR5-6000
• Graphics card: MSI Radeon RX 6600 XT Gaming X
• Storage: 1TB Corsair MP600 Elite PCIe Gen4x4 NVME M.2 SSD
• Power Supply: Seasonic Prime TX-1000
• Chassis: Open Test Bench
• Thermal Compound: Arctic MX-6
• O/S: Windows 11 Version 24H2

Included Accessories
• User guide and installation manual covering Intel and AMD installation
• AMD upper mounting brackets
• AMD AM4/AM5 Standoff kit
• Intel Upper mounting brackets
• Intel Backplate and standoff kit
• AMD Threadripper upper bracket included with the 360 and 420mm
• Set of long Philips head screws for the fans
• A set of short Philips head screws for radiator mounting
• Small tube of thermal compound (non pre applied)
• 4 pin PWM splitter cable
• A few zip ties for cable management
• Small bottle of coolant for topping up the radiator fluid level

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