I am looking at the Nvidia GT-860M which comes in both the old Kepler and new Maxwell architecture.
The old one (1152) seems to have almost twice the cores as the new one (640). The new one has a compute capability score of 5.0 compared to the old one of 3.0. Yet, the new cores are more powerful, according to:
Which is better for computation? E.g. fitting random forest models?