be quiet! PURE LOOP 3 LX Processor All-in-one liquid cooler 12 cm Black 1 pc(s)

The be quiet! PURE LOOP 3 LX 12 cm Black is an all-in-one liquid cooler designed to provide reliable CPU cooling in compact and standard PC builds. It includes a 120 mm fan and a low-profile pump assembly with a total height of 52 mm, making it suitable for cases with limited space. The cooler delivers an airflow of 105.1 m³/h (61.8 cfm) and a maximum static pressure of 2.51 mmH2O while maintaining a low noise level around 36.9 dB.

Advantages

The be quiet! PURE LOOP 3 LX combines a 120 mm fan, PWM support for automatic speed control, and a compact radiator to balance cooling performance and quiet operation. Its black finish integrates into most system aesthetics, and the included mounting support covers a wide range of modern Intel and AMD sockets for flexible installation.

Suitable for

• Compact desktops and small-form-factor builds
• Mainstream gaming and productivity PCs with limited clearance
• Systems requiring a quiet 120 mm all-in-one liquid cooler

Key specifications

• Type: All-in-one liquid cooler
• Fan diameter: 120 x 120 x 25 mm
• Airflow: 105.1 m³/h (61.8 cfm)
• Maximum static pressure: 2.51 mmH2O
• Noise level: 36.9 dB
• Weight: 1.28 kg
• Supported sockets: Socket AM5, Socket AM4, LGA 1700, LGA 1200 (H5), LGA 1155 (H2), LGA 1151 (H4), LGA 1150 (H3)
• Colour: Black
• Quantity: 1 pc

How to use

Install the radiator and 120 mm fan in an appropriate position inside the case where there is space for a single 120 mm radiator. Mount the pump/block on the CPU using the supplied brackets and screws for the correct socket. Connect the fan and pump to the motherboard headers — use the PWM fan header for automatic speed control and the dedicated pump header if available. Apply thermal paste where required according to the included instructions and secure all connections before powering the system.

Recommendations

Ensure compatibility with your case and motherboard by checking available clearance for a 120 mm radiator and verifying supported CPU sockets. Use the motherboard’s PWM header for optimal fan control and periodically inspect the cooler and fan for dust buildup to maintain performance.