ähmmm… you need to buy a new GPU. It is a GT card and far below minimum specs.
We had users with a GT710 , which also report back that it will not work ( before SU5 ).
Therefore the game gave you already the hint, as you mentioned:
a GTxxx was allways not in range… I fear with the comming updates and eg. DX12, some more users get trouble with such old hardware ( there are also users with a gtx6xx etc, which possible not have the dx12 feature-levels )