I don't know if you will be able to overclock your ram with that motherboard. Do you have any options in the bios to change memory speed, timings, or voltage? I don't have the board so you will have to look and find them.
Memory speed, at 1600Mhz or so, really doesnt show any performance gains anyway, so you really are not missing out on much at all. If you insist on having faster ram for whatever reason, assuming that board doesnt have any overclocking options for the ram, your best bet is to buy 1600Mhz sticks and replace what you have.