hmmm… a Quadro…not really made for gaming 
We had a similar discussion allready somewhere in the forum with e.g. a GT 710.
The FAQ mention a GTX 770 ( GTX, not GT ) with 2Gig as Min:
Your Quadro P400 has 2gig ram and is bit better as the former mention 710, but it is still soooooo far away from a performance of a GTX 770…
I’am really not sure about.
What kind you CPU you have ?
EDIT: and I forgot to ask… what driver you have installed ?