Getting into the Z68M-ITX HT BIOS, you're not going to find any surprises with the typical ASRock UEFI design going on. We've got all the normal sections present, but the chances are if you want to do any overclocking you'll need to be in the OC Tweaker section.
Before we move out of the BIOS, though, we just need to cover the OC Tweaker section a little. You may have noticed that when it comes to voltage we're a bit limited with the lack of ability to adjust CPU voltage. The Z68M-ITX HT is far from an overclockers board, what it offers over the H67 chipset, though, is the ability to adjust the multiplier.
While we may be limited to leaving the voltage at stock, we've got our fingers crossed we'll be able to yield an extra couple of hundred MHz out of the system with a multiplier change.