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

BH #ASPRARTLC420 • MFR #PROART LC 420
8 reviews
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ASUS ProArt LC 420 All-in-One CPU Liquid Cooler
Key Features
  • 3 x Noctua NF-A14 Industrial Fans
  • 800 - 2000 rpm Fan Speed
  • Illuminated CPU Block
  • 3-Phase Motor Pump
Keep your system and your processor cool with the sophisticated and sleek design of the ProArt LC 420 All-in-One CPU Liquid Cooler from ASUS. Adorning the ProArt aesthetic, this cooler looks sleek and stylish in larger cases without sacrificing performance, keeping your system and processor cool.
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ASUS ProArt LC 420 Overview

Keep your system and your processor cool with the sophisticated and sleek design of the ProArt LC 420 All-in-One CPU Liquid Cooler from ASUS. Adorning the ProArt aesthetic, this cooler looks sleek and stylish in larger cases without sacrificing performance, keeping your system and processor cool.

Designed for both Intel and AMD processors, the ProArt LC 420 features three large 140mm Noctua NF-A14 industrial fans that provide long-lasting performance, reaching speeds as high as 2,000 rpm, 107 CFM airflow, and remaining quiet with 31.5 dB(A) fan noise. Thick, 450mm long tubing connects the radiator to the CPU water block which incorporates a 3-phase motor pump to circulate liquid throughout the block and radiator to keep your processor cool under load. The CPU water block has an incorporated meter which can be customized to show you fan speeds, GPU temperature, memory limitation, and more.

The ProArt LC 420 is compatible with Intel LGA 1700, 1200, and 115x sockets alongside AMD's AM4 and AM5 sockets.

UPC: 197105367630

ASUS ProArt LC 420 Specs

Key Specs
Supported AMD Sockets
AM4, AM5
Supported Intel Sockets
LGA 1150, LGA 1151, LGA 1152, LGA 1155, LGA 1156, LGA 1200, LGA 1700
Heatsink Material
Aluminum
Cooling
Supported AMD Sockets
AM4, AM5
Supported Intel Sockets
LGA 1150, LGA 1151, LGA 1152, LGA 1155, LGA 1156, LGA 1200, LGA 1700
Heatsink Material
Aluminum
Cooler Type
CPU Liquid Cooler
Fan
Number of Fans
3
Bearing Type
SSO-Bearing
Connectors
9-Pin
Control Method
PWM (Pulse Width Modulation)
Fan Size
140 mm
Fan Thickness
1" / 25.00 mm
Fan Speed
800 to 2000 rpm
Static Pressure
4.18 mm H2O
Noise Level
31.5 dBA
Maximum Airflow
107 CFM
General
CPU Block Dimensions (W x H x D)
3.1 x 3.1 x 1.9" / 78.0 x 78.0 x 49.0 mm
Radiator Material
Aluminum
Radiator Size
18 x 5.5 x 1.2" / 456.0 x 140.0 x 30.0 mm
Packaging Info
Package Weight
6.99 lb
Box Dimensions (LxWxH)
18.2 x 8.7 x 6.4"

ASUS ProArt LC 420 Reviews

Excellent match with the ProArt 602 Case.

By DaveK
Rated 4 out of 5
Date: 2026-05-18

Bought this specifically as it is designed for the ProArt 602 case I selected. Integration into the ProArt case is excellent and essentially invisible for the nonRGB, low-profile look I wanted. The manual is not particularly helpful, so it did take several trys to get the correct fitment. Also, the tubes are a bit stiff and BARELY long enough; I would have preferred a bit more "flexibilty" for both.

Cooling Perfection

By TroyW
Rated 5 out of 5
Date: 2025-07-08

The cooling power, design, build quality, and the asthetics of the LC 420 are perfect.

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