its just a suggestion mate it may not work , but its worth a shot , its a good idea to turn them off anyway if your overclocking , you'll find the settings in your bios , you'll have to look them up in your mobo book or just have a poke around your bios its not hard to find
Another thing with an overclocked rig if your not bothered about the noise its also a good idea to run your cpu cooler at full speed , disable its auto setting again in bios , this keeps your idle temps down , its up to you