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Schaul, T., Quan, J., Antonoglou, I., & Silver, D. (2016). Prioritized Experience Replay. In International Conference on Learning Representations (ICLR). Retrieved from http://arxiv.org/abs/1511.05952 (DQN+)
The following site is a good reference for comparing and understanding GPU capabilities for Nvidia cards for deep learning: http://timdettmers.com/2017/04/09/which-gpu-for-deep-learning/
Based on this site we ended up going with the GTX 1080 Ti to replace our GPU in the cheetah Nvidia machine rather than the K80 cards used on the Amazon GPU instances.
The cards are pretty new so I've been looking for some advice on installing on Ubuntu Linux. This site is only a month old from this entry, and looks like it should help us get the drivers set up for the cards when they arrive: http://blog.nelsonliu.me/2017/04/29/installing-and-updating-gtx-1080-ti-cuda-drivers-on-ubuntu/