Arctic Freezer 4U-M REV.3 CPU Air Cooler – Dual 120mm PWM Fans, 350W Cooling Capacity

The Arctic Freezer 4U-M REV.3 is a professional-grade air cooler engineered specifically for 4U server chassis and high-demand workstation environments. Built to handle thermally intensive processors from both Intel and AMD platforms, it is a purpose-designed solution for mission-critical deployments where stable, sustained cooling performance is essential. At the core of the Freezer 4U-M REV.3 are eight direct-touch copper heat pipes that draw heat directly away from the processor integrated heat spreader with minimal thermal resistance. This direct-contact architecture transfers heat rapidly to the aluminium fin stack, where dual 120 mm PWM fans exhaust it efficiently within the constrained airflow path of a rack-mounted chassis. The two included fans operate across a wide speed range of 400 to 2300 RPM under PWM control, allowing the system to balance acoustics against thermal load dynamically. At full speed, airflow reaches 71.9 CFM with 3.30 mmH2O static pressure — a specification suited to the dense fin stacks and restrictive airflow lanes common in server enclosures. Both fans use dual ball bearings, a construction choice that prioritises longevity over the quieter but shorter-lived sleeve bearing designs typically found in desktop-class coolers. The cooler's overall dimensions of 124 × 156 × 145 mm are optimised to fit within 4U and larger rack units without interfering with adjacent components. ARCTIC includes its MX-6 thermal compound in the box, providing a high-performance interface between the heat pipes and the processor lid without requiring a separate purchase. A six-year warranty is provided with this product. Verified Specifications: – Dimensions (L × W × H): 124 × 156 × 145 mm – Fan size: 120 mm (dual) – Fan speed: 400–2300 RPM (PWM) – Airflow: 71.9 CFM – Static pressure: 3.30 mmH2O – Noise level: 40 dBA (at maximum speed) – Heat pipes: 8 direct-touch copper – Bearing type: Dual ball bearing – Intel socket support: LGA4189, LGA4677, LGA4710 – AMD socket support: SP6, SP3, sTR5, TR4, sTRX4, sWRX8 – Max cooling capacity: up to 350 W TDP – Rack compatibility: 4U and above – Thermal compound included: ARCTIC MX-6 – Warranty: 6 years