Noctua SSO Bearing Fan Retail Cooling NF-P14s redux-1500 PWM<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> The square 140mm frame of the NF-P14s features standard 140mm mounting holes (124.5mm spacing)， which makes it a premium grade replacement for common 140mm case fans and perfect for use on 140mm water cooling radiators </span></li><li><span class="a-list-item"> Specifically developed for high-impedance applications such as CPU coolers， water-cooling radiators or cases with tight fan grills， the NF-P14's nine-blade impeller provides outstanding pressure and airflow performance. </span></li><li><span class="a-list-item"> Noctua's signature Vortex-Control Notches split up trailing edge vortices and thus spread the fan's noise emission over a wider range of frequencies. This measure makes the fan sound more pleasant to the human ear. </span></li><li><span class="a-list-item"> Supporting fully automatic speed control via PWM， the fan uses Noctua's custom designed NE-FD1 PWM IC that integrates Smooth Commutation Drive (SCD) tech. SCD suppresses PWM switching noises and thus makes the fan quieter at lower speeds. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51FzzIofPqL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51FIyeUmwdL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41pw6dCfYfL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41W9cJow78L.jpg" noproxy>