Short answer, yes you can still use it but I'm guessing that the integrated graphics might actually be better than that card. But really, you ALWAYS need a graphics card but make it a good one! j/k kind of!
Technical answer, no you don't "need" a discreet gpu because you have decent integrated graphics but really, do you even "need" an A6 Black Edition? lol.
So, what do you plan on using this pc for? That better helps answer the question no?