Powerful airflow with PWM Black fan The CNPS9X ECO DS fan cooler delivers 571 CFM ±10% airflow It provides 241 mmH₂O ±10% static pressure and operates quietly at 314 dB(A) ±10% PWM automatic fan control ensures optimal cooling performance DTH(Direct Touch Heatpipe) Zalman’s DTH technology is applied to minimize thermal resistance and maximize cooling performance CNPS9X ECO DS effectively dissipates CPU heat with four high quality heatpipes and optimally designed heat sink (Supports up to 190W TDP) Anti-vibration Rubber Damper Rubber dampers absorb vibration noise during operation Black Coated Copper Heatpipes Black coating adds aesthetic to CNPS9X ECO DS and improves the thermal conductivity and rust resistance PWM Control for Automatic Speed Control CNPS9X ECO DS fan features automatic fan speed control to achieve the optimal balance between cooling performance and noise