Its possible but it would vbe very odd because CPU2 would HEAT UP cpu1.....
My guess is your cpus are too hot....did you bump up the vcore? if so take hat back down to stock....you shouldn't need to do that ill around 2.8Ghz.
i dont know where it is specfically because i haven't used yuor board to OC before.
Its a ram divider, a ram ratio....something like that. it will list eithe rthings like this 2:3, 3:4, 4:5, 5:6, and so on....or list things like 133, 166, 188...
Go to gygabyes forums and ask there...they will know what is called.