NZXT Technologies FX-140 PWM Liquid CPU Cooler for Kraken X60/X40 Optimized for NZXT Kraken X60 and X40 AIO Liquid CPU Cooler 54 - 98.3 CFM 21 - 37 dBA Sleeved Cables Offer Clean, Stylish Installation Push & Pull to Enhance NZXT kraken X60 and X40 AIO Liquid CPU Cooler 9 Blade Liquid State Bearing Fan 4-pin PWM Connector Two Year Warranty