Arctic Liquid Freezer III Pro 420 A-RGB Black

Arctic Liquid Freezer III Pro 420 A-RGB Black is a high-end liquid cooling solution aimed at serious gaming and workstation configurations. The massive 420 mm radiator and three 140 mm fans give you plenty of surface area for heat dissipation, which is key for heavily loaded multi-core CPUs. The synchronizable Addressable RGB lighting adds a clean visual finish to your black configuration without sacrificing performance. The copper water block and wide RPM range are the goals here – stable temperatures under serious load and silence at idle.

What you get

With a 420 mm radiator and three fans with a range of 800–2800 RPM, you have great flexibility – you can keep the system quiet at low speeds or increase airflow during heavy rendering or long gaming sessions. Each fan can push up to 110 CFM of air with a maximum pressure of 5.2 mmH2O, which is particularly useful if the radiator is behind a dense mesh front or dust filters. The pump also operates in the range of 800–2800 RPM, so the liquid flow can be adjusted according to your needs, as long as the motherboard supports adequate control. The copper water block ensures good heat transfer from the CPU cap to the liquid, while 500 mm tubes give you freedom in positioning the radiator – up, front, or even in larger cases with non-standard layouts. All of this comes in a clean black color that easily combines with any build.

• Large 420 mm radiator, suitable for high-end CPUs and configurations with long-term high load.
• Three 140 x 140 x 25 mm fans that combine good airflow with lower speeds for quieter operation.
• Wide fan range of 800–2800 RPM, allowing fine tuning based on temperature and noise.
• Airflow up to 110 CFM and pressure 5.2 mmH2O for effective cooling even through dense radiators and filters.
• Pump with speeds 800–2800 RPM at DC 12V, providing stable flow to maintain low temperatures.
• Copper water block for better heat transfer from the CPU cap to the cooling liquid.
• 500 mm tube length and black color, making installation and arrangement easier in a wide range of cases.
• Addressable RGB lighting that you can synchronize with other components for a unified look.
• 4 PIN connector on the fans for PWM control and automatic speed control through the motherboard.
• Compatibility with popular sockets AM4, AM5, LGA 1700, LGA 1851, making it a good long-term investment for future upgrades.

Who it is suitable for

This liquid cooling solution is for you if you are pursuing a serious CPU – multi-core for rendering, streaming, or high FPS gaming – and want temperature headroom for boost frequencies and stability. It is suitable for large mid-tower and full-tower cases where a 420 mm radiator can be installed without compromises. If you have a more compact case or do not need high TDP processors, it may be excessive and there are more practical, smaller solutions available.

The combination of a 420 mm radiator, copper block, and flexible pump and fan speeds makes Arctic Liquid Freezer III Pro 420 A-RGB Black a strong choice if you want serious cooling with good noise control and a clean, RGB finish for your system.