But you have the tertiary timings. Primary are those (example) 11-13-13-31 you usually see mentioned about RAM. Secondary are all the other timings in the XMP profile that you never see mentioned anywhere in the documentation. Tertiary is everything that comes after that and not in the XMP profile.
For those timings, my board's BIOS uses 1 in various places that should really better be 3. Then it uses 3 in some places that should probably better be 4, 5 or 6 etc. You might find a screenshot of a software like that asrock "timing configurator" or "MemTweakIt" that shows what people are using when running their RAM on Z77 at 2400 speeds.
I have no idea about voltages for the CPU (things like VTT and stuff). Those might do something important.