Simply changing the frequency with the start flag of 954 will not work. If you read the instructions on the first page of this thread you will see where he explains that the stock core voltage is good up to about 800. Anything higher than that you will experience errors (like you are) and that is when you have to make fine adjustments to increase stability and decrease HW errors.

It is clear that you haven't read any of the initial instructions. Do that first and then ask for clarification on what you don't understand.