You can only get stereoscopic 3d on ATI with 3rd party developers only.
DDD only has 1 monitor it supports which is over $2000 if I remember right
and IZ3D only supports one monitor witht heir system buts its more reasonable http://www.newegg.com/Product/Product.aspx?Item=N82E16824859001
With Nvidia you need to buy the 3D vision kit. ~$200 along with a monitor from their qualified list http://www.nvidia.com/object/3d-vision-pro-requirements.html