[coreboot] Overclocking Opteron 6200 from coreboot ?

[BogDan Vatra]

Hello,

  I finally managed to complete my system [0], even that all CPUs
together are *almost* twice faster than my i7, I want to be change
*almost* into *more than*, and the only way to do that is to overclock
my CPUs (or to buy more expensive ones).
Now the big question is: Is it possible to do it from coreboot? If
yes, then will the CPU temperature protection still work? E.g. will it
turn off the computer if the cpu temp will go above 70 degree Celsius?
If is not possible from coreboot, then, will it be possible to do it
from Linux? Does anyone has experience on this matter that can share ?

Thanks,
BogDan.

[0]
CPU: 2x Opteron 6276
MB: KGPED16
other uninteresting things.