what are the steps i need to take to install a 4790 on a VI formula motherboard for its first run? will it boot with the 4790 and allow me to update the bios or do i have to update the bios a different way?

from what ive read on the three full slot vi pcie z87 boards such as the formula, if you put anything into the lower x4 slot, it will make the top two full slots run at x8 x4. is this correct? in other words you cannot run sli + physx? is this also t...