Revert "Merge branch 'oc' into kk44"

-Over clocking is proving to be much more trouble than it's worth.
Perhaps, I'll come back to it but for now, it's out.

This reverts commit 15a860c19f8efe1d588f4572c2fdb296c526863c, reversing
changes made to 4d104db1a11f600c81539d72f9ba0013a04f77e0.