ASUS Rampage 4 Extreme Review
To say the BIOS has everything you could ever possibly think of is under-selling it. There is stuff on here you'd never imagine. As pictures tend to tell a lot of the story in the BIOS, and ASUS have thoughtfully included some explanatory text on the right.
No your eyes aren't playing tricks on you, there really are options for 2400MHz and 2666MHz RAM frequencies.
On the right is something similar to the options that are available on the LGA1155 version of Sandy Bridge. This X79 chipset has loads more items available to tweak.
It's nice to have a quick reference screen for all the RAM timings.
There certainly isn't a paucity of options to maximise your memory.