260 Gtx is not a cheapo card , You need also to buy a new PSU , You also need to modify the case to get better air flow , the total cost will be of no value for physx specially that the Gtx 470 is doin very good with high physx on other games .
Dark void doesn't deserve buying a new GFX card .I'm done with this game .
In the future when the gtx 470 is cheap , I'll buy another one then .I don't need to buy another one now as one is enough for current games .