so I don't know the dimensions of the case but its the Asus TUF GT501, on the website it says it can fit eatx but on pcpartpicker it says it can't fit the motherboard
https://ca.pcpartpicker.com/list/CTLhD2Should fit. Post the link to the full build so we can see the incompatibility.
Thanks ManI'd say it would fit. It is an ATX case, maybe not flagged as also supporting EATX. I'd trust the manufacturers website, which says it is compatible.