Your pc will run cooler and quieter when you replace your cpu39s standard heatsink with a hydro series h55 installation is straightforward if you can get to the back of your pc39s motherboard you can install an h55 all you39ll need is a screwdriver the compact components and flexible tubing make hydro series h55 easy to install even if you39re cramped for space it allows you to improve your cpu39s cooling efficiency even in most compact cases as long as your case has a 120mm fan moun