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Black AIO liquid cooler with 420 mm radiator three 140 mm A-RGB fans and integrated VRM fan

ARCTIC

ARCTIC Liquid Freezer III Pro 420 A-RGB liquid cooler

SKU CH-98GN-11SPK

A 420 mm radiator with three 140 mm A-RGB fans cools AMD AM5 and Intel LGA 1851, 1700, 1200 CPUs

  • Radiator size360 mm
  • Compatible socketsAMD Socket AM5
  • Block dimensions17.5 L x 6 W x 2.7 H inches
  • Cooling block materialCopper
  • Display typeARCTIC
  • Pump rotation speed2,500 rpm

Model LF III PRO 420

Color Black

LED ARGB

  • Optimised contact pressure for Intel LGA1851 and LGA1700 extends CPU lifespan
  • Offset cold-plate centres on CPU hotspot for more efficient heat transfer
  • Three 140 mm A-RGB fans deliver 110 CFM airflow at 2500 rpm
  • Integrated PWM VRM fan cools voltage regulators for stable operation
  • Cable routing inside hose sheathing leaves only one visible motherboard connection

Premium AIO for High-Performance CPUs

The Arctic Liquid Freezer III Pro 420 A-RGB is an all-in-one liquid cooler built for modern high-performance processors. It supports AMD AM5 and AM4 sockets alongside Intel LGA1851, LGA1700 and LGA1200 platforms. A 420mm radiator paired with three 140mm A-RGB fans provides substantial thermal capacity for demanding workloads. Integrated VRM cooling and a contact frame for Intel sockets complete the package.

Copper Cold Plate with Offset Mounting

The copper cold plate measures 17.5 by 6 by 2.7 inches and uses a ceramic-bearing pump rated at 2500 rpm. Native offset mounting shifts the plate centre toward the CPU hotspot for more efficient heat transfer on both Intel and AMD platforms. A contact frame optimises pressure distribution for LGA1851 and LGA1700 sockets. Fan PWM cables are integrated inside the tube sheathing so only a single cable connects to the motherboard.

Quiet Operation at 1 Sone Under Load

Three P14 Pro fans deliver 110 cubic feet per minute each at 2500 rpm while the pump and fans each register 1 sone. The 360mm copper radiator provides the surface area needed to dissipate heat without pushing fan speeds to uncomfortable levels. Plastic tubing routes cleanly between the block and radiator. A-RGB lighting adds visual flair without affecting acoustic or thermal performance.

How it compares

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

Price $67.99
Typical for this category: the median of 1,190 items is $71.99.
Radiator size 360 mm
Typical for this category: the median of 165 items is 360 mm.

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Specifications

Product
Brand nameAlphacool
Part numberACFRE00185A
Performance
Pump rotation speed2,500 rpm
Fan speed2,500 rpm
Fan airflow110 cubic feet per minute
Display
Display typeARCTIC
Ports & slots
Fan plug type4 Pin
Size & build
Radiator size360 mm
Block dimensions17.5 L x 6 W x 2.7 H inches
Cooling block materialCopper
Pump dimensions17.5 L x 6 W x 2.7 H inches
Radiator materialCopper
Fan dimensions17.5 L x 6 W x 2.7 H inches
Tube sizeus:5
Tubing materialPlastic
Compatibility
Compatible socketsAMD Socket AM5
In the box
In the boxLiquid Freezer III 420 A-RGB
Environment & compliance
Pump noise level1 sones
Fan noise level1 sones
More details
Pump bearingCeramic
Reservoir dim.17.5 L x 6 W x 2.7 H inches

Other versions of this model

5 more in the same range

Questions about this item

What socket standard does the contact frame support, and what does it cap in practice?

The contact frame supports Intel LGA1851 and LGA1700 sockets and caps mounting pressure to protect the CPU die from uneven stress.

What radiator length and fan count does the 420 mm unit need to fit?

The 420 mm radiator uses three 140 mm fans and measures 17.5 inches long, so the case must clear that length plus fan thickness.

How is the pump installed on AM5, and which step is often missed?

Mount the pump with the native offset toward the hotspot, then connect the single integrated PWM cable to the motherboard header.

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