Is it possible that your HSF needs to be cleaned??? These OE fans run at high speeds to flow sufficient air and they can draw in a lot of dust.
Does your mobo BIOS have an adjustment for the fan speed? If so something may have caused it to reset to 100%. See if there is an option to lower the fan speed percentage and keep an eye on the core temp of the CPU to be sure you're not running above 55C under max load.
Technical ignorance is NOT a destiny it is a choice. Do your homework so that you can make technically informed decisions and not be duped by advertising hype or mis-information stated as fact when its not.