Thank you so much for your reply..

But I afraid if it crashes because it's a new technology and you know that Nvidia Quatro is not for Iclone, I afraid that it will be the same like Quatro.

Did you have a chance to test 2080 or 2080 ti? Will I encounter fewer system crashes than my system with this card?

If you're using the new IRay renderer that is based on anVidia technology itself so it's likely that'll be accelerated using RTX fairly soon, beyond that it's unlikely you'll see much benefit.

As for SLI itself don't expect much joy there- it's just been replaced by the much faster nvlink which makes memory sharing on GPU tasks a lot nicer.  Support for that would be good.