you should not overclock your system at all unless you know exactly what you are doing.
when i did the auto tune i used the setting to stay within manufactures spec.
auto tune is "for the birds". use the bios default (F9 & set bclk to 133 manually if set incorrectly) values instead.
idcc is still very useful for monitoring, so keep it
You'll never know or learn anything, ever, without experimenting and fiddling and tweaking, no matter how much reading and research.