I looked over the list here:
ASRock > Products > Z68 Extreme4 Gen3 > CPU Support List

and seen many (D2) steppings supported. I however, have an i7 2600k 3.1ghz ES chip and it is of the D0 stepping.. I am about to purchase this board but I want to know if it'll support the D0 stepping or if i'll run into issues regarding this. I was told on asus boards i'd have to put my video card inot pci-e second slot for it to work because some of them don't support the D0 microcode and thus I wanted to go with Asrock as for the price, they seem hard to beat.

Any help would be appreciated.