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Black 420 mm radiator with three 140 mm fans and illuminated CPU block

ASUS

ASUS PROART LC 420 liquid cooler

SKU CH-CM5Q-T0VBE MPN PROART LC 420

All-in-one CPU liquid cooler with three Noctua NF-A14 industrialPPC-2000 PWM fans, illuminated status meter and 450 mm sleeved tubing for Intel LGA 1851/1700 and AMD AM5/AM4

  • Radiator size456 × 140 × 30 mm
  • Fan size3 Fan Slots (140 mm)
  • Compatible socketsAMD Socket AM4 / AMD Socket AM5 / Intel LGA 1150 / Intel LGA
  • Block dimensions78 × 78 × 49 mm
  • Cooling block materialCopper
  • Radiator materialAluminum
  • High airflow at 107 CFM with low 31.5 dB(A) noise from three Noctua NF-A14 industrialPPC-2000 PWM fans
  • Live load, temperature and fan-speed readout via illuminated status meter on the pump block
  • 450 mm reinforced sleeved tubing gives flexible routing and broad chassis compatibility
  • Thicker 456 x 140 x 30 mm radiator with larger coolant volume boosts heat dissipation
  • Supports Intel LGA 1851, 1700 and AMD AM5, AM4 sockets for current platforms

All-in-one liquid cooler

The ASUS PROART LC 420 is a closed-loop CPU cooler that combines a copper cold plate with a 456 x 140 x 30 mm aluminium radiator. Three Noctua NF-A14 industrialPPC-2000 PWM 140 mm fans push up to 107 CFM at 31.5 dB(A). A built-in illuminated meter displays live load, temperature and fan speed data.

Workstation builders needing broad socket support

The block fits AMD AM4, AM5 and Intel LGA 1150, 1151, 1155, 1156, 1200, 1700 and 1851 sockets, covering current and many recent platforms. Builders who require a smaller radiator for compact chassis or who prefer air cooling should look at other solutions.

450 mm sleeved tubing length

The reinforced rubber tubes measure 450 mm end to end, setting the maximum distance between the CPU block and the radiator mounting points. Verify that your case layout can accommodate this reach before purchasing.

How it compares

Measured against everything we stock in Liquid Cooling & AIO Coolers, at today’s prices. Recalculated every night.

Price $258.99
Pricier than about 92% of the 1,190 comparable items (median $71.99).

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Specifications

Product
Brand nameASUS
Model namePROART LC 420
Product typeLiquid Cooling System
Product colorBlack
Performance
Fan speed800–2,000 RPM +/- 10%
Fan airflow107 CFM / 182.5 m3/h
Static pressure4.18 mmH2O
Size & build
Radiator size456 × 140 × 30 mm
Fan size3 Fan Slots (140 mm)
Block dimensions78 × 78 × 49 mm
Cooling block materialCopper
Radiator materialAluminum
Fan dimensions140 × 140 × 25 mm
Tube size450 mm Length
Tubing materialSleeved Rubber tube
Shipping weight2.88 kg
Package size508 × 356 × 171 mm
Compatibility
Compatible socketsAMD Socket AM4 / AMD Socket AM5 / Intel LGA 1150 / Intel LGA 1151 / Intel LGA 1155 / Intel LGA 1156 / Intel LGA 1200 / Intel LGA 1700 / Intel LGA 1851
In the box
In the box1 x CPU Liquid Cooler (pre-applied thermal compound)
1 × 1-to-3 Fan Splitter Cable
1 x Accessory Pack of Screws and Brackets
1 x Quick Start Guide
Environment & compliance
Fan noise level31.5 dB(A)

Questions about this item

What case clearance is needed for the 456 mm long radiator with three 140 mm fans?

The radiator measures 456 x 140 x 30 mm and requires three 140 mm fan slots; verify your chassis supports a 420 mm class radiator with 30 mm thickness plus fan depth.

Which mounting bracket and screw set do I use for an Intel LGA 1700 or AMD AM5 socket?

The accessory pack includes dedicated brackets for Intel LGA 1700/1851 and AMD AM5/AM4; select the correct bracket, apply the pre-applied thermal compound, and torque the captive screws evenly in a cross pattern.

How often should the pre-applied thermal compound be replaced and can the sleeved rubber tubes be serviced?

Replace the thermal compound every two to three years when reseating the block; the 450 mm sleeved rubber tubes are sealed and not user-serviceable, so the unit is replaced if coolant loss occurs.

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