I am not sure about the 300 antec but likely won't fit in a mid size case, and/or it would be so limiting in space for future upgrades.
Originally Posted by thunder_2008
Moreover what kinda of antec case? the tower or the minuet? There's a big difference a matx like the latter won't fit that mb let alone gpu card.
As for an atx antec 300 tower it would fit.