Noctua's first passive CPU cooler, the NH-P1, has been designed from the ground up for fanless operation. Thanks to six heat pipes and particularly thick cooling fins with a high fin spacing, modern high-end processors with low to moderate heat output can be completely passively cooled in cases with good natural convection. For even higher cooling performance or semi-passive systems where fans only run when needed, the NH-P1 can be equipped with a slow, ultra-quiet 120 mm fan like the NF-A12x25 LS-PWM. Complemented by the professional, Torx-based SecuFirm2+ mounting system and Noctua's award-winning NT-H2 thermal paste, the NH-P1 serves as the ideal foundation for completely fanless or semi-passive premium systems.