ASUS ProArt LC 420 All-in-One CPU Liquid Cooler

Overview

The ASUS PROART LC 420 is an all-in-one CPU liquid cooler designed to maintain optimal temperatures for high-performance processors during intensive tasks. It features a large 420 mm aluminum radiator paired with three 140 mm Noctua NF-A14 fans, each capable of delivering up to 107 CFM airflow while keeping noise levels below 31.5 dB(A). This cooler is ideal for creators, gamers, and professionals who require stable and quiet cooling for demanding workloads such as 3D rendering, video editing, and extended gaming sessions.

Key features

• 420 mm radiator with extended 450 mm sleeved tubing for flexible installation in full-tower and workstation cases
• Three high-pressure Noctua NF-A14 PWM fans that balance strong airflow with low noise output
• Copper CPU plate combined with a 3-phase motor pump for efficient heat transfer and coolant circulation
• Integrated illuminated display on the water block showing real-time fan speed and temperature for easy system monitoring
• Wide socket compatibility including Intel LGA 1700, 1200, 115x and AMD AM5, AM4 platforms for versatile use
• Quiet operation with noise levels capped at 31.5 dB(A) even at full fan speed

Key specs

• Radiator size: 420 mm aluminum
• Fan size: 140 mm Noctua NF-A14
• Fan speed: up to 2,000 rpm
• Maximum airflow: 107 CFM per fan
• Tubing length: 450 mm sleeved rubber
• CPU plate material: copper
• Pump type: 3-phase motor
• Noise level: up to 31.5 dB(A)
• Socket compatibility: Intel LGA 1700, 1200, 115x; AMD AM5, AM4

Connectivity and compatibility

The cooler supports a broad range of modern CPU sockets, making it suitable for both the latest Intel and AMD processors. Its long tubing and large radiator size allow it to fit comfortably in spacious cases, especially full towers and workstations, providing flexibility for various build configurations.

Performance and reliability

With a copper CPU plate and a 3-phase motor pump, the PROART LC 420 efficiently transfers heat away from the processor and circulates coolant to maintain stable temperatures. The three Noctua fans deliver strong airflow while keeping noise to a minimum, ensuring quiet operation during long, intensive workloads. The real-time display on the water block helps you keep track of system status without interrupting your workflow.

Ideal uses and environments

This liquid cooler is well suited to users who push their systems hard, such as digital artists, video editors, and gamers who engage in extended sessions. Its quiet operation and effective cooling make it a strong choice for workstations and gaming rigs where maintaining performance without excessive noise is critical.