We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black all-in-one liquid cooler with 420mm radiator and three 140mm fans

ARCTIC

ARCTIC Liquid Freezer III Pro 420 liquid cooler

SKU CH-1B5A-1B9SY

All-in-one liquid CPU cooler with a 420 mm radiator, three 140 mm fans and an integrated VRM fan for AMD AM5, AM4 and Intel LGA1851, 1700, 1200 sockets

  • Block CompatibilityAMD Socket AM5
  • Block Dim.45.8 L x 14 W x 6.75 H centimeters
  • DisplayARCTIC
  • Pump Speed2500 rpm
  • Pump Capacity110 cubic_feet_per_minute
  • Fan Dim.45.8 L x 14 W x 6.75 H centimeters

Model LF III PRO 420

Color Black

LED Non-ARGB

  • 420 mm radiator with three 140 mm fans delivers high cooling capacity
  • P14 Pro fans reach 2500 rpm and 110 CFM for strong airflow
  • Native offset mounting shifts cold plate toward CPU hotspot for efficient heat transfer
  • Integrated VRM fan provides PWM-controlled cooling for voltage regulators
  • Integrated cable management routes PWM cables inside hose sheathing for single-cable connection

420 mm all-in-one liquid cooler

The Arctic Liquid Freezer III Pro 420 is a new all-in-one water cooler built around a 420 mm radiator and three 140 mm fans. It mounts on AMD AM5 and AM4 sockets as well as Intel LGA1851, LGA1700 and LGA1200 platforms. An integrated VRM fan and a contact frame for Intel LGA1851 and LGA1700 complete the package.

Who this suits and who should look elsewhere

This cooler suits builders who want a single 420 mm AIO with offset mounting for Intel and AMD hotspots and integrated cable routing in the hose sheathing. Buyers whose case cannot accommodate a 420 mm radiator or who need a smaller form factor will not be served by this unit.

Radiator length and fan count

The 420 mm radiator length combined with three 140 mm fans running up to 2500 rpm and delivering 110 cfm each is the specification that decides whether this cooler fits the case and meets the thermal target.

Highlights

  • 420 mm radiator with three 140 mm fans delivers high cooling capacity
  • P14 Pro fans reach 2500 rpm and 110 CFM for strong airflow
  • Native offset mounting shifts cold plate toward CPU hotspot for efficient heat transfer
  • Integrated VRM fan provides PWM-controlled cooling for voltage regulators
  • Integrated cable management routes PWM cables inside hose sheathing for single-cable connection

Specifications

BrandAlphacool
Part NumberACFRE00181A
Block CompatibilityAMD Socket AM5
Block Dim.45.8 L x 14 W x 6.75 H centimeters
DisplayARCTIC
Pump Speed2500 rpm
Pump Capacity110 cubic_feet_per_minute
Fan Dim.45.8 L x 14 W x 6.75 H centimeters
Fan RPM2500 rpm
Fan Air Flow110 cubic_feet_per_minute
Fan Connector4 Pin
Reservoir Dim.45.8 L x 14 W x 6.75 H centimeters
FeaturesLiquid Freezer III 420
Package ContentsLiquid Freezer III 420

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will the 420 mm radiator and three 140 mm fans clear my existing motherboard heatsinks and RAM?

The 420 mm radiator uses three 140 mm fans with 4-pin PWM connectors; check your case clearance and motherboard layout for the 45.8 cm length before installing.

How can I verify the pump and fans are running correctly after installation?

The pump runs at 2500 rpm and each fan at 2500 rpm with 110 CFM airflow; monitor both speeds in BIOS or software to confirm they match these figures.

Does the box include mounting hardware for AMD AM5 and Intel LGA1700, or must I buy a separate bracket?

The package contains the Liquid Freezer III 420 with integrated VRM fan and cable management; the contact frame supports AMD AM5, AM4, Intel LGA1851, 1700 and 1200 sockets.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.