Budget video card for machine learning?

Question

GPGPU

Hello!
Please advise a video card that is optimal (price, performance) for training neural networks, machine learning, data science?

Answer 1

Pay attention to the TOPs of past generations with the largest number of CUDA cores, memory size, as well as its speed.
Depending on the amount of money available GTX680/770/780/960/970/980/+Ti
UPD. I advise you to read:

spoiler

timdettmers.com/2017/04/09/which-gpu-for-deep-learning
https://www.quora.com/What-is-the-best-GPU-to-be-u...