You do have two 4GB sticks right?..... You're not running a single 8GB stick of ram I hope lol. That could cause issues since it limits your Ram bandwidth to single channel instead of dual channel.
Also, your CPU is not Turboing up. Are you running a Power Saving Power Profile? That could effect things too. Can try Balanced or High Performance to see if that changes things.
Edited: NVM 3.4 is the max turbo for that CPU.