There's usually a tweaking section in the BIOS where you can set OC. Mostly same as before, hike multiplier and see where it gets you to. You should have bought 1600X because it practically OCs itself and is not much more expensive.
On mine, I just set TPU to 2, DOCP to 3000 and because it's 3000Mhz Kingson and processor is running at 4GHz.