I have two nVidia GeForce cards - one in my desktop (a GT275) and my Sony notebook (a GT330M).
Photoshop CS5 on my notebook takes advantage of of the GPU in both 32- and 64-bit. On my desktop, the GPU enhancements only function with Photoshop CS5 64-bit. Both computers run Win7 x64. Anyone have thoughts on why this is the case and how to get 32-bit CS5 on my desktop to use the GPU?