Arctic Liquid Freezer III Pro 420mm CPU Liquid Cooler

The ARCTIC Liquid Freezer III Pro 420 is a high-performance all-in-one CPU liquid cooler built for enthusiasts who demand efficient and reliable thermal management. Designed to work with modern Intel and AMD platforms, this cooler supports LGA1700, LGA1851, AM4, and AM5 sockets, making it compatible with a wide range of Intel Core i3 through Core Ultra 9 and AMD Ryzen 3 through Ryzen 9 processors. At the heart of the cooler is a copper cold plate with micro-skived fins, engineered to maximise surface area contact with the CPU heat spreader. ARCTIC's offset mounting design shifts the cold plate toward the CPU hotspot, improving heat transfer efficiency. For Intel LGA1700 and LGA1851 platforms, the included Intel Contact Frame helps distribute contact pressure evenly across the IHS, reducing the risk of bent substrates while enhancing thermal conductivity. The 420mm radiator stands out with its 38mm thickness, which not only increases the total liquid volume compared to standard 27mm radiators but also provides additional thermal mass to absorb sudden heat spikes. Three P14 Pro 140mm fans are pre-installed, operating between 400 and 2500 RPM via PWM control and delivering up to 110 CFM of airflow at 5.2 mmH2O static pressure. Their fluid dynamic bearings ensure smooth, long-term operation with a rated lifespan backed by a 6-year warranty. A unique integrated VRM fan — operating between 400 and 2500 RPM on its own PWM signal — actively cools the motherboard's voltage regulator modules, helping sustain stable CPU power delivery during extended workloads. The pump runs between 800 and 2800 RPM under PWM control, with reinforced EPDM tubing and braided sheathing connecting the pump block to the radiator via 500mm tubes. Two control options are included: a splitter cable for independent control of the pump, VRM fan, and radiator fans, or an all-in-one cable to synchronise everything through a single PWM header. Verified Specifications: - Radiator Dimensions: 458 × 138 × 38 mm - Radiator Thickness: 38 mm - Fans: 3× P14 Pro, 140 mm, 400–2500 RPM, 110 CFM, 5.2 mmH2O - Fan Bearing: Fluid Dynamic Bearing - Fan Connector: 4-Pin PWM - Pump Speed: 800–2800 RPM (PWM) - Pump Electrical: 0.35 A | 12 V DC - Cold Plate: Copper, Micro Skived Fins - Tube Length: 500 mm | Outer Diameter: 12.4 mm | Inner Diameter: 6.0 mm - Tubing Material: Reinforced EPDM with braided sheathing - VRM Fan: 400–2500 RPM (PWM), 0.05 A | 12 V DC - Socket Compatibility: LGA1700, LGA1851, AM4, AM5 - Operating Ambient Temperature: 0–40 °C - Warranty: 6 Years - SKU: ACFRE00181A