ARCTIC Alpine 23 CO Single Tower CPU Air Cooler for AMD AM4 & AM5

The ARCTIC Alpine 23 CO (model ACALP00036A) is a compact single-tower CPU air cooler engineered specifically for AMD AM4 and AM5 platforms. Its radial aluminium heatsink features 50 Y-shaped fins produced through a precision extrusion process that maximises surface area within a small footprint, allowing effective heat dissipation without occupying excessive case space. The installed height is just 65 mm, making it well-suited for builds where vertical clearance is at a premium. At the heart of the cooler sits a 90 mm PWM-controlled fan capable of operating across a wide speed range of 200 to 2,700 rpm. This broad range means the fan can run near-silently at low loads — rated at just 0.3 Sone — while still ramping up to deliver full cooling performance under sustained CPU demand. The fan draws only 0.09 A at 12 V, reflecting its low power draw. Speed is managed via a standard 4-pin PWM connector, compatible with all modern AMD motherboards. The "CO" designation stands for Continuous Operation. The fan uses a premium dual ball bearing, which is significantly more resilient to dust ingress and elevated temperatures than standard sleeve or single-ball alternatives. ARCTIC's sinus-magnetised motor design reduces commutation vibration to approximately 5% of that produced by a conventional DC motor. The resulting lower coil temperature extends service life considerably compared to previous ARCTIC motor generations. ARCTIC backs this with a 6-year manufacturer warranty. Installation is tool-minimal: the Alpine 23 CO clips directly onto existing AMD retention modules on AM4 and AM5 motherboards without requiring a backplate replacement. MX-4 thermal compound is pre-applied to the heatsink base, enabling a clean first-mount without needing to source or apply paste separately. Verified Specifications: • Model: ACALP00036A • Compatibility: AMD AM5, AM4 • Heatsink type: Radial, aluminium • Number of fins: 50 Y-shaped • Heatsink outer diameter: 93.4 mm | Core diameter: 32 mm • Fan diameter: 90 mm • Fan speed: 200–2,700 rpm (PWM) • Connector: 4-pin • Bearing: Dual ball bearing • Noise level: 0.3 Sone • Electrical: 0.09 A | 12 V • Thermal interface material: MX-4 (pre-applied) • Dimensions: 121 (L) × 98.6 (W) × 65 (H) mm • Installation height: 65 mm • Weight: 275.5 g • Warranty: 6 years • GTIN/EAN: 4895213702836