I am having similar issues with a XI Hero fitting into a Corsair Obsidian RGB case. When I drop it on the alignment peg, the bottom 6 holes line up perfect. Top 3 holes are off 1-2 mm toward the front of the case...I can't figure it out....
Did you ever figure out a solution? I am having the same issue fitting the XI Hero into my H440 case. The IO shield is preventing the top 3 holes from aligning[/QUOTE
I have the same problem but with the 390 series Maximus XI board, see my post @ https://rog.asus.com/forum/showthread.php?106464-ASUS-ROG-z390-Maximus-XI-Hero-(Wifi)-Does-NOT-fit-i...
I took it to a local computer shop, they tried 5 different ATX cases from InWin, none will fit the z390 board.
I was advised to return it and buy an MSI instead, the computer shop called it a cheap and poorly manufactured board...
The only case I was able to successfully install it is in the cheap ass ThermalTake Versa H24 (https://www.amazon.com/gp/product/B00OFR33OO/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1). However, that case has limited space for a 164mm cooler and barely can house a single 120mm watercooler
ALL ASUS Z390 BOARDS NEED TO BE MANUFACTURER RECALLED!!!!
You should be able to push the top of the board against the back of the case to insert the screws, yes it is a tight fit but I have been able to install these boards in Corsair, Lian Li, NZXT cases