I keep saying that you will be better to look for modules with 1.5V to start with ... people really concidere this, some hight voltage modules will not start at all, so, you will not have the opportunity to set their voltage in the bios.
I am talking about over 1.8Volts. ( to protect your CPU , the default setting will not allow more than this, and many modules refuse to under volt/clock)
do you understand why?