ARCTIC Liquid Freezer III 420mm ARGB CPU Liquid Cooler ( White ) ( Liquid Freezer 3 )

The ARCTIC Liquid Freezer III 420mm ARGB in White is a high-capacity all-in-one CPU liquid cooler built for enthusiasts who demand strong thermal headroom without sacrificing system aesthetics. Its 420mm aluminium radiator measures 458 x 138 x 38 mm and features an extended fin stack that ARCTIC states increases cooling surface area by 23% compared to the previous generation, allowing the unit to absorb and dissipate heat over a longer sustained period — an advantage during extended CPU workloads and overclocking sessions. Three ARCTIC P14 PWM PST A-RGB fans ship pre-installed in a push configuration on the radiator. Each fan spins between 200 and 2000 rpm, delivers up to 69.90 cfm (117.06 m³/h) of airflow, and generates 2.0 mmH₂O of static pressure — making the high-density fin stack viable at lower noise levels. The fans use fluid dynamic bearings and connect via 4-pin PWM connectors, with daisy-chain capability so the entire fan array runs from a single PWM signal. The pump head integrates a PWM-controlled water pump rated 800–2800 rpm (0.35 A, 12 V DC) and a 60 mm VRM fan (400–2500 rpm, 0.05 A, 12 V DC) that actively cools motherboard voltage regulators — particularly useful with power-hungry processors in cases with limited airflow. Two control modes are provided: an all-in-one 4-pin PWM connector governs everything through a single signal, while an included splitter cable offers three independent 4-pin PWM connections for granular per-component speed control. The cold plate uses copper with micro-skived fins for efficient heat transfer. Tubes measure 450 mm long with a 12.4 mm outer / 6.0 mm inner diameter, and fan cables are routed inside the hose jacket to minimise internal cable clutter. ARCTIC's contact frame for Intel LGA1700 and LGA1851 reduces CPU deformation caused by Intel's ILM, and AMD mounting applies a 5 mm offset to align the cold plate with the off-centre heat source of AMD's chiplet-based Ryzen processors (AM4, AM5). Addressable RGB lighting is delivered through 12 A-RGB LEDs per fan (plus pump head illumination) via standard 3-pin A-RGB connectors with daisy-chain support, compatible with most motherboard RGB headers and popular lighting software. ARCTIC includes MX-6 thermal compound in the box. The cooler is backed by a 6-year manufacturer warranty. Verified Specifications: • Radiator dimensions: 458 (L) x 138 (W) x 38 (H) mm | Material: Aluminium • Fans: 3x P14 PWM PST A-RGB | Speed: 200–2000 rpm | Airflow: 69.90 cfm | Static pressure: 2.0 mmH₂O | Bearing: Fluid Dynamic • Pump speed: 800–2800 rpm (PWM) | 0.35 A / 12 V DC • VRM fan speed: 400–2500 rpm (PWM) | 0.05 A / 12 V DC • Cold plate: Copper, micro-skived fins • Tube length: 450 mm | Outer Ø 12.4 mm / Inner Ø 6.0 mm • LEDs: 12x A-RGB per fan | 0.40 A / 5 V DC | 3-pin A-RGB connector • Compatibility: Intel LGA1700 (LGA1851 confirmed), AMD AM5, AM4 • Weight: 2325 g | Operating temperature: 0–40 °C • Warranty: 6 Years