I have the Z170A GAMING M7 and I just can't get the motherboard properly lined up with the I/O. The I/O itself is properly installed (secure on all sides) but all the ports don't properly fit through the I/O shield even with the standups on the case matching. Only the audio connectors fit through but the left half doesn't. I included pictures below:
https://s31.postimg.org/yykbpqmpn/20160730_130057_1469898109253.jpg
https://s31.postimg.org/szh9tbnrv/20160730_130115_1469898109390.jpg
https://s31.postimg.org/yykbpqmpn/20160730_130057_1469898109253.jpg
https://s31.postimg.org/szh9tbnrv/20160730_130115_1469898109390.jpg