You could technically wait until the BIOS is out of beta and tests have been done with memory to see if it improves performance. I will be doing this in the future I assure you; however, those who already have the ASRock Fatal1ty 990FX Professional motherboard can do it right now via the BIOS beta update.
This is the kind of BIOS update I hope to see from the other top motherboard makers in the near future. You can fully expect compatibility issues in the beginning, but that is why it is still in Beta. Hopefully AMD follows through with AMP and strive to get it as a standard for all AMD boards.