Succeeding the award-winning NH-C14, the NH-C14S is an elite class top-flow CPU cooler that is extremely efficient, highly compatible and remarkably adjustable – a top-flow solution for the highest demands. Enjoy your Noctua NH-C14S! Fix the bolts using the NM-ICS1 clip-on spacers. Yours sincerely, Roland Mossig, Noctua CEO INSTALLATION MANUAL