I have a similiar system and got it up to 3.1 ghz stable, but my ram is generic PC5300, you should be able to get better results.
One thing though, remove the thermal paste on the stock HSF and on your CPU, the thermal paste it comes with is complete garbage, when I overclocked mine originally I had load tems of 70-74C, I took off the crappy paste and put some artic silver 5 on it and now Im getting 53-57 temps under load. I dont know what kind of ****** intel put on the HSF but that thermal paste is really bad stuff.