I would only use an FX-9000 series CPU on a mobo that has been approved by the maker for these 220w TDP processors.
I do not know which Asus mobos have been approved but Asus sales/tech should be able to provide an accurate, official response via e-mail or phone.
Asrock has approved the Extreme9 and 990FX Fatality and provided the necessary BIOS to support the FX-9000 series CPUs.
Gigabyte AM3+ mobos with the "FXA" designation should all support the FX-9000 series mobos as these are updated models with revised VRM circuits.
To be certain you are considering the correct mobos ALWAYS check the CPU compatibility online listing at the mobo maker's website. The prior generation Giga AM3+ mobos have an insufficeint VRM circuit to even handle OC'd 8-core FX processors - so be certain exactly what you are buying when choosing a mobo for the FX-9000 series CPUs.
Technical ignorance is NOT a destiny it is a choice. Do your homework so that you can make technically informed decisions and not be duped by advertising hype or mis-information stated as fact when its not.