Im can not say this is 100% stable, still playing around but ..
it did manage to get through 10passes of IBT @ Very High, and a Prime95 run at 7hrs earlier.
I do need to do a good 12+ hr run with Prime still.
Im not even sure where my scores should by with 4.5Ghz and 1866 RAM, but I am certainly pleased with it
The temps were during Intel Burn test BTW.
I actually thought about cranking up the more, because it seems the CPU still has plenty of room to stretch its legs yet.
But I think Ill leave it right where it sits for a 24/7 OC if it gets through a long Prime run without issue.