Motherboard manufacturers can't test every brand and model of memory for any motherboard model.
Your best bet is to contact Corsair tech support and/or check the Corsair memory forum for a setup that includes the memory and motherboard that you want to buy. With luck, there will be one or more forum members that can report if they have identical hardware.
It's possible that ASRock tech support can test the same memory and motherboard and report back to you.
Which specific Corsair Dominator modules to you want to buy? How many memory modules? Total memory amount?
Which cpu do you plan on buying?