Remove the radiator from the case and If possible remove the fan, get some canned air and blow it out. If you cant get the fan off you can blow the dust out from the fan side, be sure to hold the fan from spinning as you do so.
Remove the radiator from the case and If possible remove the fan, get some canned air and blow it out. If you cant get the fan off you can blow the dust out from the fan side, be sure to hold the fan from spinning as you do so.