Extreme cpu cooling performance with customizable pwm fan speed and a high capacity 240mm radiator hydro series h105 provides extreme cpu cooling performance the 38mm thick 240mm top mounted high capacity radiator is paired with high rpm sp120l fans for the fast heat dissipation you need for highly overclocked cpus and pwm fan speed fan control lets you select the precise level of cooling power you need through your motherboard bios installation is easy with an all new mounting bracket th