ARCTIC Liquid Freezer III Pro 420 A-RGB
420mm AIO CPU Cooler with P14 Pro A-RGB fans, integrated VRM cooling, offset mounting and a premium 38mm radiator for demanding desktop builds.
Large Aluminium Radiator
140mm A-RGB Fans
High Static Pressure Class
Manufacturer Warranty
Built for High-Performance CPU Cooling
Introducing the ARCTIC Liquid Freezer III Pro 420 A-RGB, a large-format all-in-one CPU liquid cooler designed for enthusiasts, high-performance gaming PCs, content creation systems and demanding workstation-class desktop builds.
Its 420mm radiator works with three 140mm P14 Pro A-RGB fans, while the integrated VRM fan adds additional airflow around the motherboard power-delivery area. The cooler also combines offset mounting, a copper micro-skived cold plate and a 38mm-thick radiator to provide a cooling platform suited to sustained CPU workloads.
420mm Premium Radiator
The 458 × 138 × 38mm aluminium radiator provides a large heat-dissipation surface and greater fluid volume than conventional 27mm radiator designs.
P14 Pro A-RGB Fans
Three 140mm P14 Pro A-RGB fans operate from 400–2500 RPM, delivering up to 110 CFM airflow and 5.2 mmH₂O static pressure.
Integrated VRM Fan
A dedicated PWM-controlled VRM fan provides additional airflow around the CPU socket and motherboard voltage-regulation components.
Offset CPU Mounting
The offset mounting design positions the cold plate toward the CPU hotspot area for more targeted heat transfer.
Intel Contact Frame
The included Intel contact-frame approach is designed to improve CPU contact-pressure distribution on supported Intel platforms.
Integrated Cable Management
Fan wiring is integrated into the cooler's sleeving to reduce cable clutter and simplify installation.
A-RGB Lighting & Cooling Control
The Liquid Freezer III Pro 420 A-RGB combines addressable lighting with independent PWM control options, allowing builders to coordinate the cooler with the rest of their system.
Gen2 Lighting
P14 Pro Fan Range
PWM Pump Control
Separate or Unified Control
Technical Specifications
ACFRE00185A
CPU Water Cooler / AIO
420mm
Aluminium, 458 × 138 × 38mm
3× P14 Pro A-RGB, 140mm
400–2500 RPM
110 CFM / 186 m³/h
5.2 mmH₂O
Fluid Dynamic Bearing
800–2800 RPM PWM
400–2500 RPM PWM
Copper, Micro-Skived Fins
500mm, 12.4mm Outer / 6.0mm Inner
MX-6, 0.8g
12× A-RGB Gen2 LEDs
3-Pin A-RGB Plug + Socket
AM4, AM5
LGA1851, LGA1700
63mm
2358g
0–40°C
Black
4895265000355
6 Years
Who Is the Liquid Freezer III Pro 420 A-RGB For?
Platform Technologies & Compatibility
The cooler supports current AMD AM4/AM5 and Intel LGA1700/LGA1851 desktop platforms. Always confirm radiator dimensions, motherboard clearance and case support before installation.
Before You Build
- Confirm that your PC cabinet supports a 420mm radiator and approximately 68mm radiator-plus-fan assembly height.
- Allow at least 63mm installation clearance as specified by ARCTIC.
- Check motherboard clearance around the CPU socket and M.2 area. Some boards may have clearance limitations caused by oversized M.2 heatsinks.
- For A-RGB lighting, ensure your motherboard or controller provides a compatible 3-pin 5V A-RGB connection.
- Use the included mounting hardware appropriate for your CPU socket.
Common Buying Questions
Is the ARCTIC Liquid Freezer III Pro 420 A-RGB compatible with AM5?
Yes. The cooler officially supports AMD AM4 and AM5 processors.
Does it support Intel LGA1851?
Yes. The Liquid Freezer III Pro 420 A-RGB supports Intel LGA1851 as well as LGA1700.
What fans are included with ACFRE00185A?
It includes three 140mm ARCTIC P14 Pro A-RGB fans with a 400–2500 RPM operating range.
Does the cooler have A-RGB lighting?
Yes. The radiator fans and VRM module use A-RGB Gen2 LEDs and connect through a 3-pin A-RGB interface.
What is the radiator thickness?
The aluminium radiator is 38mm thick, while the complete radiator-and-fan assembly is approximately 68mm high.
Is a thermal paste included?
Yes. ARCTIC supplies 0.8g of MX-6 thermal compound with the cooler.
Does the Liquid Freezer III Pro 420 A-RGB have a VRM fan?
Yes. It includes a PWM-controlled VRM fan operating from 400–2500 RPM to provide additional airflow around the CPU socket area.
How long is the warranty?
ARCTIC specifies a 6-year manufacturer warranty for the Liquid Freezer III Pro 420 A-RGB.
Building a High-Performance PC?
If you're pairing this 420mm ARCTIC AIO with a powerful CPU, let's get the rest of the build right too. Browse our cooling, cabinet and graphics card options or contact Clarion Computers for configuration guidance.