Nvidia 1080 is a good one. Take a look at this write up. http://timdettmers.com/2014/08/14/which-gpu-for-deep-learning/ http://timdettmers.com/2014/08/14/which

Nvidia 1080 is a good one. Take a look at this write up. http://timdettmers.com/2014/08/14/which-gpu-for-deep-learning/ http://timdettmers.com/2014/08/14/which-gpu-for-deep-learnin... its updated in July 2016 with info about the later versions.