ARCTIC Liquid Freezer III Pro 420mm CPU Liquid Cooler ( Black ) ( Liquid Freezer 3 )

The ARCTIC Liquid Freezer III Pro 420mm CPU Liquid Cooler in Black (model ACFRE00181A) is a high-performance all-in-one liquid cooling solution engineered for demanding workloads and high-end desktop platforms. At its core is a large 420mm aluminium radiator measuring 458 mm × 138 mm × 38 mm, giving it substantial thermal mass to handle sustained heat loads from modern multi-core processors. Three pre-installed P14 Pro fans in a push configuration drive airflow across the radiator, each rated at 400–2500 RPM with a combined airflow of 110 CFM and 5.2 mmH₂O of static pressure. The fans use fluid dynamic bearings for quiet, long-lasting operation. All fan cabling is routed neatly through the hose jacket, minimising cable clutter inside the chassis. The pump block houses an in-house developed PWM pump operating between 800 and 2800 RPM, drawing 0.35 A at 12 V DC. The cold plate uses copper with micro-skived fins for efficient heat transfer from the CPU IHS. Braided tubes measure 450 mm in length with a 12.4 mm outer and 6.0 mm inner diameter for reliable coolant flow. The cooler includes 0.8 g of MX-6 thermal interface material in the box. A distinguishing feature of the Pro variant is the 60 mm PWM-controlled VRM fan integrated into the pump block. Running at 400–2500 RPM (0.05 A at 12 V DC), it directs targeted airflow at motherboard voltage regulation components, improving stability in overclocked or low-airflow environments. It can be controlled independently via the included splitter cable. Socket compatibility covers Intel LGA1851 and LGA1700, as well as AMD AM5 and AM4. An Intel contact frame is included for optimised die contact on supported platforms. The unit operates across an ambient temperature range of 0–40 °C and is backed by a 6-year manufacturer's warranty. Key Verified Specifications: • Radiator: Aluminium, 458 × 138 × 38 mm • Fans: 3× P14 Pro, 400–2500 RPM, 110 CFM, 5.2 mmH₂O static pressure, fluid dynamic bearing • Pump: PWM, 800–2800 RPM, 0.35 A / 12 V DC • Cold plate: Copper, micro-skived fins • VRM fan: 60 mm, 400–2500 RPM, 0.05 A / 12 V DC • Tubes: 450 mm length, 12.4 mm OD / 6.0 mm ID • TIM included: MX-6 (0.8 g) • Socket support: Intel LGA1851, LGA1700; AMD AM5, AM4 • Operating ambient: 0–40 °C • Unit weight: 2,370 g • Warranty: 6 years • SKU / Model: ACFRE00181A