Turbo Boost not working?

Solution
restore the default values though;
If this doesnt fix, then clear the CMOS by taking out the battery from your mobo, wait 30 secs and then reinsert the battery back.
Yes, you cannot overclock a non k intel cpu chipset. Download CPU-Z and check whether its turbo boosting to 3.8 GHz and also post a screenshot here. I dont see any reason why it would not turbo boost. In the bios it will always show 3.4 GHz.