I am looking to buy a ASUS ROG STRIX X370-F GAMING for my New PC But i Need a Case so i go to newegg's website and look for the form factor of the mother board and it says atx so look around on there site and in the search option's I don"t see atx. what is atx I know of Micro atx, atx mini, and full size atx but i have never heard of just atx. I would be happy for any help thank you