New install of NVidia GPU now all (cuda_fermi) work getting computation errors.

I just (upgraded) installed a NVidia GTX 650Ti and I'm getting computation errors on all the new work for (cuda_fermi). I know you've heard this song before but I seem to be having a hard time finding a resolution in my searches of the forums.
I did find a short comment to go into "Control Panel"/"System and Security"/"System" / "Advanced System settings" / "Environment Variables" / and add the "NEW" comment CUDA_GRID_SIZE_COMPAT ;and I did so, but that is as far as I've gotten. I am running driver #1.3.18.0 in my GPU in WIN7. Would you please assist?
Sorry to say I'm not that computer savvy so if you would please refer me to a forum string that would apply with a step-by-step resolution. This would be much appreciated! Thank you. Lance & Chris

From NVidia driver problems which cause computation errors:

2) Kepler cards unsupported

Drivers affected: All drivers from 304.48 (BETA) onwards.
Hardware affected: nVidia 'Kepler' - GT 6xx and GTX 6xx cards.

Symptom: All tasks end in errors when using the stock v6.10 'cuda_fermi' application.

Solution/workround:
a) Use an optimised Cuda application, where available.
b) Downgrade to the 301.42 driver - only possible on GTX 670/680/690 cards, not on newer releases like the 650/660 or their Ti variants.
c) Set an environment variable, as shown below.

The environment variable to use is

CUDA_GRID_SIZE_COMPAT

and it needs to have the value 1 (one)

You need to be running in Administrator mode, and you need to be running at least driver 306.02 (BETA) or 306.23 (WHQL)

Here's how to reach the setting screen:

Windows 7/Vista:



Windows XP: