Hello Elmar,
thank you for your reply - unfortunately this did not solve the problem. I also tried the "limiting neighbors" - tweak as Alexey recommended in an earlier post. At first none of the GPUs was used in the process. Limiting the neighbors to 40 with the tweak at least the RTX 2080 Super is used - but the 1660 Ti is constantly ignored. Is it maybe possible, that the algorithm is fully utilizing the capacity of the more powerful GPU, thus not being able to use the 1660 Ti anymore?
best regards,
Andreas