8800gts 320, why because that 210 likely isn't even going to meet minimum requirements for physx as that requires that the target card have 32 or more shaders. Most 210 have only 16 with a few having up to 24. if your system can't handle the power load of the G80 card then start looking for a less demanding card like a cheap used 8800/9800gt while a gt240 will be more than enough except for a few rare instances.