Re: 3dmark vantage
I would say that is about right, maybe just a little low for your system mate. That is assmuming that you have everything at stock.
My system pulls in about 100 points higher with everything at stock, but you have to account for Nvidias physics boost. My GPU score is about 2000 less than yours which sounds about right.
It also seems like you have other programs open at the same time which can slow you down. Resart your computer, turning everything non essential off, overclock, and you will be much happier.