No one seems to be saying if they are using 2 sticks of ram or 1. With 2 sticks in any 754 board you can expect at least a 10-15mhz drop in max OC.
Let us know how many sticks and what board you have as well as voltage. We also need to know what PSU you have and vid card. If you just threw a 6800 in there with the new RAM and have a cheese wiz PSU your overclocks will suck. ;)
Thanks guys.