I have the Z68MA-D2H-B3, it's almost the same unlike the PCI slots. Mine don't have.
You cannot raise the base clock with this mobo, just put multi to 43 to begin. I will be fine and ajust the dynamic voltge to +0.05v. Disable auto change multi.
You'll OK with this i think.
Mine is 44x multi and else at stock. Anything higher craches
Hope it help you
sorry for my english