So I asked Asus this same question they said ATX is the same size as EATX...I will be buying the "ROG Maximus XI Extreme" when it releases it is an EATX board with the dimensions of 12 inch x 10.9 inch motherboard(30.5cm x 27.7cm) the Case I want is the H700I which dimensions are (Up to 272mm or 10.7-inches) I know a few cases have smaller dimensions but can hold an EATX with an unsupported overhang but all the screws are in place. So i'm just wondering if this will be the case with the H700i since its only a .2 difference and the website says it supports EATX so how many different sizes of EATX could there be that this new board is TOO big by .2 inches and wont work? neither of the cases are on PCpartpicker so I cant trust that. Any opinion or help is appreciated thank you! https://www.asus.com/us/Motherboards/ROG-MAXIMUS-XI-EXTREME/ AND https://www.nzxt.com/products/h700i-matte-white