The hydro series h45 makes your pc run cooler and quieter when you replace your cpus stock heatsink the compact components and flexible tubing make the hydro series h45 easy to install even if youre cramped for space it allows you to improve your cpus cooling efficient even in the most compact cases as long as your case has a 120mm fan mount near the cpu the h45 will probably fit the h45 comes pre filled and never needs priming