I spent a couple weeks with the ASRock X99E-ITX/ac before beginning my performance testing, running various configurations and CPUs and checking hardware compatibility. I verified my power consumption numbers using different power supplies and played a few hours of games with some members of the TPU community to get an overall feel for the board and to verify stability. Once completed, I tore down the system, mounted my Corsair H110 cooler, and put the board through the paces. I will, as with other recent reviews of mine, let the numbers do the talking.
SuperPi
wPrime
AIDA64
CineBench