NVIDIA GeForce 7600 GS ..

[epixoip]

.. well.. its maybe six years old, but the nvidia web says it supports Cuda:

http://www.nvidia.com/object/winxp-306.2...river.html

it does not explicitly say on that page that your card supports CUDA. and as a warning for the future, manufacturers *do* deprecate cards over time. just because nvidia chooses to support CUDA on a certain card today doesn't mean they will six months from now.