yes i have the same problem...the multiplier jumps..thats the problem with high vcore....(turbo is actually no stable with high vcore)

solution:

..go thru the voltage increments.....example like vcore...1.4..then raise it to 1.45..then raise it to 1.55...then increase bclk..by 1mhz..then adjust vcore again...don't do 1.8v