I have the components you have, just for a 2 days, my AKASA 775 did not want to go into the CCO holes though so am on the stock cooler for the moment.
There are preset overclock profiles in the BIOS starting from 4.0Ghz and going up in 200mhz increments, you could give one of them a go and then check what it has done with the overclock utility when you are in windows to see what v-core it has assigned.