that link shows current Premiere Pro CC 2014 supported GPUs
for CS6 you apply the hack and add your card to the list exactly as 'sniffer' shows
as CS6 only knew the GTX up to 580 back then
but my browser keeps jumping me to current system requirements. Sorry I do not have quick access to the 'hack'. Search it or someone else will guide you maybe.
The hack is simply deleting the Cuda-Supported-Cards.txt file from the root of Premiere.
I couldn't find the Cuda-Supported-Cards.txt file at first, didn't know about right-click .app file "show package contents", but then found it. I also searched for the hack and some people said delete the file, others said add your Graphics cards to the file, others said add your graphics card to the the Opencl_supported_cards.txt file. I added my card to the Cuda-Supported-Cards.txt first, and it didn't work. I left the graphics card in that file, but also added it to the Opencl_supported_cards.txt file and now it works. Thanks so much.
Good, you have it working. Ann would know best about the 'deleting txt file' as I applied the 'adding to list' method before I knew of the 'deleting' method.