Nvidia GT 610 or GTX 260

the only adventage GT610 has is DirectX 11 support,and less power consuption(so less powerfull too)
the GTX260 only supports DirectX 10.1, but is a monster 111,9 gb/s and TDP of 182W card ,compared to entry level GT610 card.
so, if you dont care about DirectX 11 games,then I would prefer GTX260.(watch out your PSU specs)
anyway with the other card you wont be able to play decently any DirectX 11 game