K620 vs GeForce GTX 1050 vs GTX 1050-Ti for CUDA Cosmological Calculations

I am trying to decide on which GPUs to buy for Cosmology Calculations.[/b]

I realized that the GeForce GTX 1050-Ti has more cores and it is cheaper than the P620.

On the other hand, the P620 is so new that it is not even described in the Nvidia Compute table.

There is no entry there for P620, nor for GeForce GTX 1050-Ti, there is one entry for 1050 only.

Please let me know the compute capability for P620 and GeForce GTX 1050 and GTX 1050-Ti
and the pros and cons for using them in Cosmology calculations.

I am nor a gamer so I don’t care for impressive graphics