For little money you can fix the crashing and fps issues for the steam version of onimusha 3.

It seems the Nvidia GT 610 2gb runs this game perfectly and i mean perfectly, you can view it here -

http://www.geforce.com/hardware/desktop-gpus/geforce-gt-610/specifications


It runs the game off of steam with no configuration and has stable fps and Performance

ALSO NO CRASHES! Win win and it a very cheap card!