be quiet! Silent Loop 3 240mm AIO Cooler
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About This Item
- 240mm radiator size for efficient cooling
- Supports LGA 1851, LGA 1150, LGA 1151, LGA 1155, LGA 1200, LGA 1700, AM4, and AM5 sockets
- Two 120mm fans with PWM support for precise speed control
- Fluid Dynamic Bearing fans for quiet operation at 18.7 dB low speed
- Multi-colour LED illumination with 3-pin connector
- Aluminum radiator with copper base plate for optimal heat transfer
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be quiet! Silent Loop 3 240mm | Ultra-Quiet AIO Liquid Cooler
The be quiet! Silent Loop 3 240mm is a premium all-in-one liquid cooler engineered for silent, high-performance PC builds. Designed for UK enthusiasts and professionals, it delivers exceptional thermal management with virtually inaudible operation, making it ideal for demanding processors and quiet home or office environments.
Key Specifications
| Metric | Spec. |
|---|---|
| Radiator Size | 240mm (2x120mm) |
| Fan Speed | 2500 RPM max |
| Noise Level | 18.7 dB (low) / 36.9 dB (high) |
| Supported Sockets | LGA 1851, 1700, 1200, AM4, AM5 |
| Warranty | 3 years |
German Engineering for Silent Performance
The Silent Loop 3 240mm embodies be quiet!’s commitment to German precision and silent operation. Featuring fluid dynamic bearing fans and a copper base plate with aluminium radiator, this AIO cooler maximises heat dissipation while maintaining whisper-quiet performance. The PWM-controlled fans automatically adjust speed based on thermal load, ensuring optimal cooling without unnecessary noise.
Advanced Cooling Technology
This 240mm AIO utilises a high-efficiency pump operating at 3500 RPM maximum, circulating coolant through precision-engineered tubing with 40cm length for flexible installation. The dual 120mm fans generate up to 76.7 CFM airflow and 3.96 mmH2O pressure, effectively managing heat from even the most demanding processors. Multi-colour LED illumination adds aesthetic appeal without compromising thermal performance.
Broad Socket Compatibility
The Silent Loop 3 supports an extensive range of modern processor sockets including Intel’s LGA 1851, 1700, 1200, and AMD’s AM4 and AM5 platforms. This versatility makes it an excellent choice for both current and future PC builds, whether you’re running a high-end gaming rig or a professional workstation requiring reliable, quiet cooling.
Installation and Setup
Installation is straightforward with the included mounting kit, thermal grease, and comprehensive manual. The 4-pin fan and pump connectors ensure compatibility with standard motherboard headers, while the 500mm cable length provides adequate reach for most case configurations. CPU brackets are included for secure mounting across supported socket types.
Box Contents
- be quiet! Silent Loop 3 240mm radiator unit
- 2x 120mm PWM fans with FDB bearings
- Mounting kit for supported sockets
- Thermal grease
- Installation manual
- Screws and fittings
Check before you buy
- Confirm your processor socket compatibility (LGA 1851, 1700, 1200, AM4, AM5)
- Verify your case supports 240mm radiator mounting
- Check available space for 277mm height installation
- Ensure your motherboard has 4-pin CPU fan and pump headers
Frequently Asked Questions
Q: What makes this cooler “silent”?
A: Advanced fluid dynamic bearing fans and PWM control maintain noise levels as low as 18.7 dB while providing effective cooling.
Q: Is this cooler compatible with my Intel/AMD processor?
A: Yes, it supports LGA 1851, 1700, 1200, 1150, 1151, 1155 and AMD AM4/AM5 sockets.
Q: How difficult is installation?
A: Installation is straightforward with included mounting kit, thermal paste, and detailed manual for supported platforms.
Q: What warranty coverage is provided?
A: This product includes a 3-year manufacturer warranty covering defects in materials and workmanship.
The Consultant’s Verdict & Warranty
The be quiet! Silent Loop 3 240mm represents exceptional value for users prioritising silent operation without compromising cooling performance. Its German engineering pedigree, broad compatibility, and three-year warranty make it ideal for both gaming enthusiasts and professional users requiring reliable, quiet thermal management. Covered by the standard Manufacturer Warranty, this AIO cooler delivers premium performance for discerning UK PC builders.
| Performance | |
|---|---|
| Suitable location | Processor |
| Fan connector | 4-pin |
| Pulse-width modulation (PWM) support | Yes |
| Bearing type | Fluid Dynamic Bearing (FDB) |
| Noise level (low speed) | 18.7 dB |
| Noise level (high speed) | 36.9 dB |
| Type | All-in-one liquid cooler |
| Fan diameter | 12 cm |
| Supported processor sockets | LGA 1851, LGA 1150 (Socket H3), LGA 1151 (Socket H4), LGA 1155 (Socket H2), LGA 1200 (Socket H5), LGA 1700, Socket AM4, Socket AM5 |
| Maximum airflow | 76.7 cfm |
| Maximum air pressure | 3.96 mmH2O |
| Airflow | 130.3 m³/h |
| Number of fans | 2 fan(s) |
| Quantity per pack | 1 pc(s) |
| Pump connector | 4-pin |
| Pump motor speed (min) | 1700 RPM |
| Pump motor speed (max) | 3500 RPM |
| Pump motor speed | 3500 RPM |
| Fan speed (max) | 2500 RPM |
| Fan's mean time to failure (MTTF) | 300000 h |
| Design | |
| Fan connector | 4-pin |
| Number of fans | 2 fan(s) |
| Illumination colour | Multi |
| Product colour | Black |
| Cable length | 0.5 m |
| Illumination LED | Yes |
| Radiator material | Aluminum |
| Base plate material | Copper |
| LED connector type | 3-pin |
| Technical details | |
| Noise level (low speed) | 18.7 dB |
| Noise level (high speed) | 36.9 dB |
| Type | All-in-one liquid cooler |
| Fan diameter | 12 cm |
| Supported processor sockets | LGA 1851, LGA 1150 (Socket H3), LGA 1151 (Socket H4), LGA 1155 (Socket H2), LGA 1200 (Socket H5), LGA 1700, Socket AM4, Socket AM5 |
| Maximum airflow | 76.7 cfm |
| Maximum air pressure | 3.96 mmH2O |
| Airflow | 130.3 m³/h |
| Number of fans | 2 fan(s) |
| Cable length | 0.5 m |
| Fan connector | 4-pin |
| Illumination LED | Yes |
| Sustainability certificates | Triman |
| Warranty period | 3 year(s) |
| Compliance certificates | CE, Federal Communications Commission (FCC), RoHS, UKCA, WEEE |
| Ports & interfaces | |
| Fan connector | 4-pin |
| Pump connector | 4-pin |
| Power | |
| LED voltage | 5 V |
| Fan power consumption | 3.6 W |
| Fan voltage | 12 V |
| Fan current | 0.3 A |
| Colour | |
| Product colour | Black |
| Weight & dimensions | |
| Fan dimensions (W x D x H) | 120 x 120 x 25 mm |
| Package depth | 321 mm |
| Package width | 240 mm |
| Package height | 140 mm |
| Width | 120 mm |
| Package weight | 2.4 kg |
| Depth | 52 mm |
| Height | 277 mm |
| Weight | 1.38 kg |
| Cable length | 0.5 m |
| Radiator width | 12 cm |
| Radiator depth | 27.7 cm |
| Radiator height | 2.7 cm |
| Tube length | 40 cm |
| Waterblock width | 8 cm |
| Waterblock depth | 5.6 cm |
| Waterblock height | 9.35 cm |
| Packaging data | |
| Package depth | 321 mm |
| Package width | 240 mm |
| Package height | 140 mm |
| Package weight | 2.4 kg |
| Package type | Box |
| Indication | |
| Illumination colour | Multi |
| Packaging content | |
| Screws included | Yes |
| Package type | Box |
| Mounting kit | Yes |
| Thermal grease | Yes |
| Manual | Yes |
| CPU bracket(s) | Yes |
| Other features | |
| Pump connector | 4-pin |
| Thermal grease | Yes |
| LED voltage | 5 V |
| Logistics data | |
| Shipping (inner) case width | 28.6 cm |
| Shipping (inner) case length | 65.8 cm |
| Shipping (inner) case height | 50.8 cm |
| Shipping (inner) case gross weight | 20.5 kg |
| Products per shipping (inner) case | 8 pc(s) |
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