Heading into the BIOS you're going to see an almost identical design to what was seen on the Z87X-UD3H, which we also reviewed recently. The main difference is the color scheme. Where the UD3H offered a blue scheme to match that board, the OC offers an orange one that matches it - a nice touch.
If you're going to do any overclocking, you'll no doubt be bouncing towards the Home and Performance section of the BIOS. The Performance area is the one that offers you a lot more options when it comes to all aspects of overclocking.
Moving past those two key areas you can see the standard setup of options when it comes to the rest of the BIOS. As always, though, if you're heading into the BIOS, you'll more than likely be looking at the first two areas.
Finally before we leave the BIOS, it's worth mentioning that by hitting F2 you can go into the more classic UEFI BIOS. While this was always our option over the 3D one, the new default BIOS is really fantastic and easy to use. As always, if you're going to do overclocking you'll be in the M.I.T. section, and apart from that the rest of it is self-explanatory.