Im planning a ryzen build in the tower 900 and since there are no EATX motherboard's i can find for the AM4 chipset, would a ATX motherboard look ok and will it fit (I know it will physically fit but will it line up with the screw holes?).
Thermaltake web page states in specifications : Supported Motherboards: ATX, microATX, Mini‑ITX, Extended ATX
so the answer is yes, just may nee to move (maybe not) the stand posts that hold the board in place to match the holes in your board.