what do you mean underclock at stock speed? you mean the voltage?
well, i can't change the voltage at all on my msi mobo. it's a 890gxm-g65. can't even touch the voltage, they're all set to auto... any suggestions? should i just reset cmos?
I mean undervolt sorry. Are you sure you can't change the voltage? Try selecting the vCore or MSI's CPU voltage equivalent option and change it. If you can, lower it to 1.3V, otherwise, I'd just reset the CMOS if it's too much of a problem.