You don't have any case fans!?
Have at least one intake. There should be a spot for one (what case do you have?). Put some fans in that case, intake and exhaust.
Go into the BIOS and change your Vcore to 1.75 volts. You need good case ventilation. For now, put that louder/faster CPU fan back onto that heatsink.
You might wanna buy a new HSF (Thermalright AX-7, SLK-800, Alpha PAL8045).