Page #5 at The PPro/Encore tutorial list http://forums.adobe.com/message/2276578 has a link to the CUDA HACK, which is a simple entry in a text file
History of MINIMUM requirements from CS3 to Cloud
[Moved to Hardware forum.]
That GTX 780 Ti card works perfectly with just that small edit of an Adobe file follow John's link.
Sure wish I could afford that card!