Since I couldn't get much info on the subject, that's what I ended up doing. I just sent it for delivery back to Newegg today as an RMA. I just hope Newegg will actually replace it.
In the meantime, I bought a ASRock board of similar specs to last me until the Asus gets back. Assuming it's good, I'll either keep it as a backup or sell one of the boards. Luckily, I already have someone interested in the latter.
I guess we'll see how it goes.