ASSASSIN 4SThe ASSASSIN 4S provides exceptional performance and is armed with seven 6mm heat pipes and a redesigned 140mm FDB fan. The 4S models eliminate the rear 120mm fan, providing a slimmer, more symmetrical cooler.ASSASSIN 4SSOPHISTICATED ELEGANCEBEAUTY IN SIMPLICITYThe elegant design of the ASSASSIN 4S is not just visually pleasing; it also leads to optimal air flow and maximum compatibility.QUIET OR PERFORMANCE MODEWith a simple slide of a switch, the ASSASSIN 4S can morph from a whisper-quiet cooler when low noise is of the utmost importance to the efficient cooling force DeepCool air coolers are known for.LET IT SHINE!The shell of ASSASSIN 4S is clean, sleek, and helps channel air through the fin towers, while the slimmer profile provides unobstructed clearance for high-profile RGB RAM.BE COOL, BE CALMA key factor in the ASSASSIN 4S's extremely silent operation is the use of three-phase, six-pole fan motors with low voltage and power consumption. DeepCool is so confident in our new design that the ASSASSIN 4S comes with 6 years of limited warranty coverage!EXCEPTIONAL BY DESIGNFeaturing seven heat pipes that deliver improved heat transfer through two fin-array heat sink towers for high performance efficiency. The included DM9 thermal paste meets the rigorous standards used in industrial applications.THE FLOW BELOWDue to the center 140mm fan sitting deep into the heart of the ASSASSIN 4S, there is a lower flow of air that provides additional cooling to the toasty surrounding VRMs.STREAMLINED INSTALLATIONInstalling larger air coolers can be difficult and is a prime reason the hardware and installation was designed to be extremely user friendly. Even the magnetic top fan cover was crafted with ease of installation in mind.