It will run at the maximum speed that is supported of 2700. Check if there are any Bios updates for your Mobo as it may have upgrades to what is supported.
The board will default to whatever is its maximum if you use higher spec ram. However this is not to say that the ram is definately supported as there are other factors. click here would be the best place to check and then use DAB.com to find the same stick but cheaper by searching the product number.