Yes it has only fan headers and there is no GPU which has RGB headers
Not true. I was watching a Live Stream yesterday on YouTube by Asus NA and they were showing off the new Aura Sync software updates and features. Unfortunately their audio output was completely busted and only portions of the stream were comprehensible. One of the few parts that I could hear, was mentioning all the ways to control RGB through Aura Sync, one of which was the GPU they had in that build did indeed have RGB Headers on it. But which GPU is the mystery.